78137264 has 20 divisors (see below), whose sum is σ = 154249056. Its totient is φ = 38331072.

The previous prime is 78137251. The next prime is 78137347. The reversal of 78137264 is 46273187.

It is a super-2 number, since 2×78137264² = 12210864050811392, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45224 + ... + 46919.

Almost surely, 2^78137264 is an apocalyptic number.

It is an amenable number.

78137264 is a deficient number, since it is larger than the sum of its proper divisors (76111792).

78137264 is a wasteful number, since it uses less digits than its factorization.

78137264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92204 (or 92198 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 78137264 is about 8839.5284942128. The cubic root of 78137264 is about 427.5163547201.

The spelling of 78137264 in words is "seventy-eight million, one hundred thirty-seven thousand, two hundred sixty-four".