78099264 has 42 divisors (see below), whose sum is σ = 223859090. Its totient is φ = 26032896.

The previous prime is 78099257. The next prime is 78099277. The reversal of 78099264 is 46299087.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 77580864 + 518400 = 8808^2 + 720^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67219 + ... + 68370.

Almost surely, 2^78099264 is an apocalyptic number.

It is an amenable number.

78099264 is an abundant number, since it is smaller than the sum of its proper divisors (145759826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78099264 is a wasteful number, since it uses less digits than its factorization.

78099264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135607 (or 135594 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 78099264 is about 8837.3787969058. The cubic root of 78099264 is about 427.4470397100.

The spelling of 78099264 in words is "seventy-eight million, ninety-nine thousand, two hundred sixty-four".