78385224 has 32 divisors (see below), whose sum is σ = 196600320. Its totient is φ = 26043456.

The previous prime is 78385211. The next prime is 78385261. The reversal of 78385224 is 42258387.

It is a super-2 number, since 2×78385224² = 12288486683060352, which contains 22 as substring.

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, 2457 + ... + 12759.

It is an arithmetic number, because the mean of its divisors is an integer number (6143760).

Almost surely, 2^78385224 is an apocalyptic number.

It is an amenable number.

78385224 is an abundant number, since it is smaller than the sum of its proper divisors (118215096).

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

78385224 is a wasteful number, since it uses less digits than its factorization.

78385224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10629 (or 10625 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 78385224 is about 8853.5430196052. The cubic root of 78385224 is about 427.9681025520.

The spelling of 78385224 in words is "seventy-eight million, three hundred eighty-five thousand, two hundred twenty-four".