80981628 has 48 divisors (see below), whose sum is σ = 232565760. Its totient is φ = 21357504.

The previous prime is 80981617. The next prime is 80981633. The reversal of 80981628 is 82618908.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 80981628.

It is a congruent number.

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, 35988 + ... + 38171.

It is an arithmetic number, because the mean of its divisors is an integer number (4845120).

Almost surely, 2^80981628 is an apocalyptic number.

It is an amenable number.

80981628 is an abundant number, since it is smaller than the sum of its proper divisors (151584132).

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

80981628 is a wasteful number, since it uses less digits than its factorization.

80981628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74186 (or 74184 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 80981628 is about 8998.9792754512. The cubic root of 80981628 is about 432.6421562618.

The spelling of 80981628 in words is "eighty million, nine hundred eighty-one thousand, six hundred twenty-eight".