78418944 has 132 divisors (see below), whose sum is σ = 231622144. Its totient is φ = 25546752.

The previous prime is 78418939. The next prime is 78418957. The reversal of 78418944 is 44981487.

It is a super-2 number, since 2×78418944² = 12299061556150272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78418944.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 617409 + ... + 617535.

Almost surely, 2^78418944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78418944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115811072).

78418944 is an abundant number, since it is smaller than the sum of its proper divisors (153203200).

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

78418944 is a wasteful number, since it uses less digits than its factorization.

78418944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 199 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 78418944 is about 8855.4471372145. The cubic root of 78418944 is about 428.0294619717.

The spelling of 78418944 in words is "seventy-eight million, four hundred eighteen thousand, nine hundred forty-four".