74978456 has 64 divisors (see below), whose sum is σ = 167918400. Its totient is φ = 30707712.

The previous prime is 74978447. The next prime is 74978471. The reversal of 74978456 is 65487947.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222320 + ... + 222656.

It is an arithmetic number, because the mean of its divisors is an integer number (2623725).

Almost surely, 2^74978456 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 74978456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83959200).

74978456 is an abundant number, since it is smaller than the sum of its proper divisors (92939944).

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

74978456 is a wasteful number, since it uses less digits than its factorization.

74978456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 512 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 50.

The square root of 74978456 is about 8659.0101050871. The cubic root of 74978456 is about 421.6759489764.

The spelling of 74978456 in words is "seventy-four million, nine hundred seventy-eight thousand, four hundred fifty-six".