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80069280 = 2535315381
BaseRepresentation
bin1001100010111…
…00001010100000
312120122221101220
410301130022200
5130444204110
611540055040
71661402064
oct461341240
9176587356
1080069280
1141219265
1222994480
1313785a95
14a8c3aa4
157069370
hex4c5c2a0

80069280 has 96 divisors (see below), whose sum is σ = 260402688. Its totient is φ = 20659200.

The previous prime is 80069257. The next prime is 80069293. The reversal of 80069280 is 8296008.

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

It is a super-2 number, since 2×800692802 = 12822179199436800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12190 + ... + 17570.

It is an arithmetic number, because the mean of its divisors is an integer number (2712528).

Almost surely, 280069280 is an apocalyptic number.

80069280 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 80069280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130201344).

80069280 is an abundant number, since it is smaller than the sum of its proper divisors (180333408).

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

80069280 is a wasteful number, since it uses less digits than its factorization.

80069280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5430 (or 5422 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 80069280 is about 8948.1439416228. The cubic root of 80069280 is about 431.0112848146.

The spelling of 80069280 in words is "eighty million, sixty-nine thousand, two hundred eighty".

Divisors: 1 2 3 4 5 6 8 10 12 15 16 20 24 30 31 32 40 48 60 62 80 93 96 120 124 155 160 186 240 248 310 372 465 480 496 620 744 930 992 1240 1488 1860 2480 2976 3720 4960 5381 7440 10762 14880 16143 21524 26905 32286 43048 53810 64572 80715 86096 107620 129144 161430 166811 172192 215240 258288 322860 333622 430480 500433 516576 645720 667244 834055 860960 1000866 1291440 1334488 1668110 2001732 2502165 2582880 2668976 3336220 4003464 5004330 5337952 6672440 8006928 10008660 13344880 16013856 20017320 26689760 40034640 80069280