78516808 has 8 divisors (see below), whose sum is σ = 147219030. Its totient is φ = 39258400.

The previous prime is 78516793. The next prime is 78516811. The reversal of 78516808 is 80861587.

It can be written as a sum of positive squares in only one way, i.e., 45131524 + 33385284 = 6718^2 + 5778^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4907293 + ... + 4907308.

Almost surely, 2^78516808 is an apocalyptic number.

It is an amenable number.

78516808 is a deficient number, since it is larger than the sum of its proper divisors (68702222).

78516808 is a wasteful number, since it uses less digits than its factorization.

78516808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9814607 (or 9814603 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 78516808 is about 8860.9710528813. The cubic root of 78516808 is about 428.2074430394.

The spelling of 78516808 in words is "seventy-eight million, five hundred sixteen thousand, eight hundred eight".