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80288860 = 22523347503
BaseRepresentation
bin1001100100100…
…01110001011100
312121002002121111
410302101301130
5131023220420
611544511404
71663305211
oct462216134
9177062544
1080288860
1141359233
1222a7b564
1313831a02
14a93db08
1570ae45a
hex4c91c5c

80288860 has 48 divisors (see below), whose sum is σ = 176795136. Its totient is φ = 30569792.

The previous prime is 80288827. The next prime is 80288861. The reversal of 80288860 is 6888208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80288861) 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, 159369 + ... + 159871.

It is an arithmetic number, because the mean of its divisors is an integer number (3683232).

Almost surely, 280288860 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80288860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88397568).

80288860 is an abundant number, since it is smaller than the sum of its proper divisors (96506276).

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

80288860 is a wasteful number, since it uses less digits than its factorization.

80288860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 80288860 is about 8960.4051247698. The cubic root of 80288860 is about 431.4049234043.

The spelling of 80288860 in words is "eighty million, two hundred eighty-eight thousand, eight hundred sixty".

Divisors: 1 2 4 5 10 20 23 46 92 115 230 347 460 503 694 1006 1388 1735 2012 2515 3470 5030 6940 7981 10060 11569 15962 23138 31924 39905 46276 57845 79810 115690 159620 174541 231380 349082 698164 872705 1745410 3490820 4014443 8028886 16057772 20072215 40144430 80288860