78970856 has 8 divisors (see below), whose sum is σ = 148070370. Its totient is φ = 39485424.

The previous prime is 78970847. The next prime is 78970873. The reversal of 78970856 is 65807987.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 41344900 + 37625956 = 6430^2 + 6134^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4935671 + ... + 4935686.

Almost surely, 2^78970856 is an apocalyptic number.

It is an amenable number.

78970856 is a deficient number, since it is larger than the sum of its proper divisors (69099514).

78970856 is a wasteful number, since it uses less digits than its factorization.

78970856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9871363 (or 9871359 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 78970856 is about 8886.5547879929. The cubic root of 78970856 is about 429.0312715489.

The spelling of 78970856 in words is "seventy-eight million, nine hundred seventy thousand, eight hundred fifty-six".