78130864 has 40 divisors (see below), whose sum is σ = 173519648. Its totient is φ = 33384960.

The previous prime is 78130859. The next prime is 78130879. The reversal of 78130864 is 46803187.

It is a happy number.

It is a super-2 number, since 2×78130864² = 12208863818772992, 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 7 ways as a sum of consecutive naturals, for example, 46324 + ... + 47980.

Almost surely, 2^78130864 is an apocalyptic number.

It is an amenable number.

78130864 is an abundant number, since it is smaller than the sum of its proper divisors (95388784).

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

78130864 is a wasteful number, since it uses less digits than its factorization.

78130864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093 (or 2087 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 78130864 is about 8839.1664765406. The cubic root of 78130864 is about 427.5046821871.

The spelling of 78130864 in words is "seventy-eight million, one hundred thirty thousand, eight hundred sixty-four".