78628072 has 16 divisors (see below), whose sum is σ = 147621600. Its totient is φ = 39262320.

The previous prime is 78628013. The next prime is 78628079. The reversal of 78628072 is 27082687.

It is not an unprimeable number, because it can be changed into a prime (78628079) 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, 429 + ... + 12547.

It is an arithmetic number, because the mean of its divisors is an integer number (9226350).

Almost surely, 2^78628072 is an apocalyptic number.

It is an amenable number.

78628072 is a deficient number, since it is larger than the sum of its proper divisors (68993528).

78628072 is a wasteful number, since it uses less digits than its factorization.

78628072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12936 (or 12932 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 78628072 is about 8867.2471489183. The cubic root of 78628072 is about 428.4096145524.

The spelling of 78628072 in words is "seventy-eight million, six hundred twenty-eight thousand, seventy-two".