78570868 has 6 divisors (see below), whose sum is σ = 137499026. Its totient is φ = 39285432.

The previous prime is 78570859. The next prime is 78570907. The reversal of 78570868 is 86807587.

It can be written as a sum of positive squares in only one way, i.e., 71537764 + 7033104 = 8458^2 + 2652^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9821355 + ... + 9821362.

Almost surely, 2^78570868 is an apocalyptic number.

It is an amenable number.

78570868 is a deficient number, since it is larger than the sum of its proper divisors (58928158).

78570868 is a wasteful number, since it uses less digits than its factorization.

78570868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19642721 (or 19642719 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 49.

The square root of 78570868 is about 8864.0209837297. The cubic root of 78570868 is about 428.3056962424.

The spelling of 78570868 in words is "seventy-eight million, five hundred seventy thousand, eight hundred sixty-eight".