78299264 has 32 divisors (see below), whose sum is σ = 156464940. Its totient is φ = 39029760.

The previous prime is 78299257. The next prime is 78299303. The reversal of 78299264 is 46299287.

It can be written as a sum of positive squares in 2 ways, for example, as 78145600 + 153664 = 8840^2 + 392^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×78299264² = 12261549485883392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53162 + ... + 54614.

Almost surely, 2^78299264 is an apocalyptic number.

It is an amenable number.

78299264 is a deficient number, since it is larger than the sum of its proper divisors (78165676).

78299264 is a wasteful number, since it uses less digits than its factorization.

78299264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888 (or 1876 counting only the distinct ones).

The product of its digits is 435456, while the sum is 47.

The square root of 78299264 is about 8848.6871342590. The cubic root of 78299264 is about 427.8116036944.

The spelling of 78299264 in words is "seventy-eight million, two hundred ninety-nine thousand, two hundred sixty-four".