78700928 has 16 divisors (see below), whose sum is σ = 156787260. Its totient is φ = 39350400.

The previous prime is 78700927. The next prime is 78700931. The reversal of 78700928 is 82900787.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×78700928² = 12387672136122368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78700927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307298 + ... + 307553.

Almost surely, 2^78700928 is an apocalyptic number.

It is an amenable number.

78700928 is a deficient number, since it is larger than the sum of its proper divisors (78086332).

78700928 is an equidigital number, since it uses as much as digits as its factorization.

78700928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614865 (or 614853 counting only the distinct ones).

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

The square root of 78700928 is about 8871.3543498160. The cubic root of 78700928 is about 428.5418937530.

The spelling of 78700928 in words is "seventy-eight million, seven hundred thousand, nine hundred twenty-eight".