78680704 has 16 divisors (see below), whose sum is σ = 156746970. Its totient is φ = 39340288.

The previous prime is 78680671. The next prime is 78680737. The reversal of 78680704 is 40708687.

It is an interprime number because it is at equal distance from previous prime (78680671) and next prime (78680737).

It can be written as a sum of positive squares in only one way, i.e., 49000000 + 29680704 = 7000^2 + 5448^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307219 + ... + 307474.

Almost surely, 2^78680704 is an apocalyptic number.

It is an amenable number.

78680704 is a deficient number, since it is larger than the sum of its proper divisors (78066266).

78680704 is an equidigital number, since it uses as much as digits as its factorization.

78680704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614707 (or 614695 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 78680704 is about 8870.2144280733. The cubic root of 78680704 is about 428.5051827342.

The spelling of 78680704 in words is "seventy-eight million, six hundred eighty thousand, seven hundred four".