78865244 has 24 divisors (see below), whose sum is σ = 147592368. Its totient is φ = 36742400.

The previous prime is 78865243. The next prime is 78865247. The reversal of 78865244 is 44256887.

It is a super-2 number, since 2×78865244² = 12439453422359072, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78865195 and 78865204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78865243) 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, 1127 + ... + 12609.

It is an arithmetic number, because the mean of its divisors is an integer number (6149682).

Almost surely, 2^78865244 is an apocalyptic number.

It is an amenable number.

78865244 is a deficient number, since it is larger than the sum of its proper divisors (68727124).

78865244 is a wasteful number, since it uses less digits than its factorization.

78865244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11605 (or 11603 counting only the distinct ones).

The product of its digits is 430080, while the sum is 44.

The square root of 78865244 is about 8880.6105645952. The cubic root of 78865244 is about 428.8399306465.

The spelling of 78865244 in words is "seventy-eight million, eight hundred sixty-five thousand, two hundred forty-four".