78057904 has 20 divisors (see below), whose sum is σ = 151501464. Its totient is φ = 38960768.

The previous prime is 78057899. The next prime is 78057911. The reversal of 78057904 is 40975087.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5919 + ... + 13825.

Almost surely, 2^78057904 is an apocalyptic number.

It is an amenable number.

78057904 is a deficient number, since it is larger than the sum of its proper divisors (73443560).

78057904 is a wasteful number, since it uses less digits than its factorization.

78057904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8532 (or 8526 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 78057904 is about 8835.0384266284. The cubic root of 78057904 is about 427.3715702350.

It can be divided in two parts, 78057 and 904, that added together give a square (78961 = 281²).

The spelling of 78057904 in words is "seventy-eight million, fifty-seven thousand, nine hundred four".