78906516 has 24 divisors (see below), whose sum is σ = 198278304. Its totient is φ = 24278880.

The previous prime is 78906479. The next prime is 78906521. The reversal of 78906516 is 61560987.

78906516 is nontrivially palindromic in base 5.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252750 + ... + 253061.

It is an arithmetic number, because the mean of its divisors is an integer number (8261596).

Almost surely, 2^78906516 is an apocalyptic number.

It is an amenable number.

78906516 is an abundant number, since it is smaller than the sum of its proper divisors (119371788).

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

78906516 is a wasteful number, since it uses less digits than its factorization.

78906516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505831 (or 505829 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 78906516 is about 8882.9339747631. The cubic root of 78906516 is about 428.9147248743.

The spelling of 78906516 in words is "seventy-eight million, nine hundred six thousand, five hundred sixteen".