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80128960 = 265250403
BaseRepresentation
bin1001100011010…
…10101111000000
312120202222021021
410301222233000
5131003111320
611541235224
71662041062
oct461525700
9176688237
1080128960
114125a08a
1222a02b14
13137a6cb2
14a8db732
15707bdaa
hex4c6abc0

80128960 has 28 divisors (see below), whose sum is σ = 190807848. Its totient is φ = 32051456.

The previous prime is 80128949. The next prime is 80128969. The reversal of 80128960 is 6982108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80128969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124882 + ... + 125521.

It is an arithmetic number, because the mean of its divisors is an integer number (6814566).

Almost surely, 280128960 is an apocalyptic number.

80128960 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80128960 is an abundant number, since it is smaller than the sum of its proper divisors (110678888).

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

80128960 is a wasteful number, since it uses less digits than its factorization.

80128960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250420 (or 250410 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 80128960 is about 8951.4780902374. The cubic root of 80128960 is about 431.1183436236.

The spelling of 80128960 in words is "eighty million, one hundred twenty-eight thousand, nine hundred sixty".

Divisors: 1 2 4 5 8 10 16 20 32 40 64 80 160 320 250403 500806 1001612 1252015 2003224 2504030 4006448 5008060 8012896 10016120 16025792 20032240 40064480 80128960