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80489760 = 25351312899
BaseRepresentation
bin1001100110000…
…10110100100000
312121110022012020
410303002310200
5131101133020
611553101440
71665103011
oct463026440
9177408166
1080489760
114148616a
1222b57880
13138a22a0
14a993008
1570edc40
hex4cc2d20

80489760 has 96 divisors (see below), whose sum is σ = 273067200. Its totient is φ = 19811328.

The previous prime is 80489743. The next prime is 80489767. The reversal of 80489760 is 6798408.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (80489767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210 + ... + 12689.

It is an arithmetic number, because the mean of its divisors is an integer number (2844450).

Almost surely, 280489760 is an apocalyptic number.

80489760 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80489760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136533600).

80489760 is an abundant number, since it is smaller than the sum of its proper divisors (192577440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80489760 is a wasteful number, since it uses less digits than its factorization.

80489760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12930 (or 12922 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 80489760 is about 8971.6085514249. The cubic root of 80489760 is about 431.7644463446.

The spelling of 80489760 in words is "eighty million, four hundred eighty-nine thousand, seven hundred sixty".

Divisors: 1 2 3 4 5 6 8 10 12 13 15 16 20 24 26 30 32 39 40 48 52 60 65 78 80 96 104 120 130 156 160 195 208 240 260 312 390 416 480 520 624 780 1040 1248 1560 2080 3120 6240 12899 25798 38697 51596 64495 77394 103192 128990 154788 167687 193485 206384 257980 309576 335374 386970 412768 503061 515960 619152 670748 773940 838435 1006122 1031920 1238304 1341496 1547880 1676870 2012244 2063840 2515305 2682992 3095760 3353740 4024488 5030610 5365984 6191520 6707480 8048976 10061220 13414960 16097952 20122440 26829920 40244880 80489760