78164044 has 24 divisors (see below), whose sum is σ = 157012128. Its totient is φ = 33352320.

The previous prime is 78164041. The next prime is 78164063. The reversal of 78164044 is 44046187.

It is a super-2 number, since 2×78164044² = 12219235548867872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78164041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534 + ... + 12514.

It is an arithmetic number, because the mean of its divisors is an integer number (6542172).

Almost surely, 2^78164044 is an apocalyptic number.

It is an amenable number.

78164044 is an abundant number, since it is smaller than the sum of its proper divisors (78848084).

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

78164044 is a wasteful number, since it uses less digits than its factorization.

78164044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12225 (or 12223 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 78164044 is about 8841.0431511219. The cubic root of 78164044 is about 427.5651900631.

The spelling of 78164044 in words is "seventy-eight million, one hundred sixty-four thousand, forty-four".