78264756 has 36 divisors (see below), whose sum is σ = 199766112. Its totient is φ = 25833744.

The previous prime is 78264737. The next prime is 78264757. The reversal of 78264756 is 65746287.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×78264756² = 12250744063479072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78264757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6846 + ... + 14261.

Almost surely, 2^78264756 is an apocalyptic number.

It is an amenable number.

78264756 is an abundant number, since it is smaller than the sum of its proper divisors (121501356).

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

78264756 is a wasteful number, since it uses less digits than its factorization.

78264756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21220 (or 21215 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 78264756 is about 8846.7370255931. The cubic root of 78264756 is about 427.7487461767.

The spelling of 78264756 in words is "seventy-eight million, two hundred sixty-four thousand, seven hundred fifty-six".