78730528 has 24 divisors (see below), whose sum is σ = 163159920. Its totient is φ = 37293120.

The previous prime is 78730523. The next prime is 78730529. The reversal of 78730528 is 82503787.

It is not an unprimeable number, because it can be changed into a prime (78730523) 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, 64138 + ... + 65353.

It is an arithmetic number, because the mean of its divisors is an integer number (6798330).

Almost surely, 2^78730528 is an apocalyptic number.

It is an amenable number.

78730528 is an abundant number, since it is smaller than the sum of its proper divisors (84429392).

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

78730528 is a wasteful number, since it uses less digits than its factorization.

78730528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129520 (or 129512 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 78730528 is about 8873.0224839116. The cubic root of 78730528 is about 428.5956129421.

The spelling of 78730528 in words is "seventy-eight million, seven hundred thirty thousand, five hundred twenty-eight".