78312296 has 32 divisors (see below), whose sum is σ = 155622600. Its totient is φ = 36879360.

The previous prime is 78312253. The next prime is 78312307. The reversal of 78312296 is 69221387.

It can be written as a sum of positive squares in 4 ways, for example, as 35880100 + 42432196 = 5990^2 + 6514^2 .

It is a super-2 number, since 2×78312296² = 12265631409583232, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5396 + ... + 13628.

Almost surely, 2^78312296 is an apocalyptic number.

It is an amenable number.

78312296 is a deficient number, since it is larger than the sum of its proper divisors (77310304).

78312296 is a wasteful number, since it uses less digits than its factorization.

78312296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8309 (or 8305 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 78312296 is about 8849.4234840469. The cubic root of 78312296 is about 427.8353371296.

Subtracting from 78312296 its reverse (69221387), we obtain a palindrome (9090909).

The spelling of 78312296 in words is "seventy-eight million, three hundred twelve thousand, two hundred ninety-six".