80915904 has 84 divisors (see below), whose sum is σ = 235960920. Its totient is φ = 26503680.

The previous prime is 80915897. The next prime is 80915911. The reversal of 80915904 is 40951908.

It is an interprime number because it is at equal distance from previous prime (80915897) and next prime (80915911).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32794 + ... + 35174.

Almost surely, 2^80915904 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 80915904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117980460).

80915904 is an abundant number, since it is smaller than the sum of its proper divisors (155045016).

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

80915904 is a wasteful number, since it uses less digits than its factorization.

80915904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2458 (or 2445 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 80915904 is about 8995.3267867265. The cubic root of 80915904 is about 432.5250816866.

The spelling of 80915904 in words is "eighty million, nine hundred fifteen thousand, nine hundred four".