78007928 has 16 divisors (see below), whose sum is σ = 146512680. Its totient is φ = 38937888.

The previous prime is 78007889. The next prime is 78007933. The reversal of 78007928 is 82970087.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3050 + ... + 12857.

Almost surely, 2^78007928 is an apocalyptic number.

It is an amenable number.

78007928 is a deficient number, since it is larger than the sum of its proper divisors (68504752).

78007928 is a wasteful number, since it uses less digits than its factorization.

78007928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16526 (or 16522 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 41.

The square root of 78007928 is about 8832.2096895398. The cubic root of 78007928 is about 427.2803435931.

The spelling of 78007928 in words is "seventy-eight million, seven thousand, nine hundred twenty-eight".