78920528 has 40 divisors (see below), whose sum is σ = 170435520. Its totient is φ = 35182080.

The previous prime is 78920507. The next prime is 78920533. The reversal of 78920528 is 82502987.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2468 + ... + 12803.

It is an arithmetic number, because the mean of its divisors is an integer number (4260888).

Almost surely, 2^78920528 is an apocalyptic number.

It is an amenable number.

78920528 is an abundant number, since it is smaller than the sum of its proper divisors (91514992).

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

78920528 is a wasteful number, since it uses less digits than its factorization.

78920528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15315 (or 15309 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 78920528 is about 8883.7226431266. The cubic root of 78920528 is about 428.9401118669.

The spelling of 78920528 in words is "seventy-eight million, nine hundred twenty thousand, five hundred twenty-eight".