74474624 has 64 divisors (see below), whose sum is σ = 173595840. Its totient is φ = 31159296.

The previous prime is 74474611. The next prime is 74474629. The reversal of 74474624 is 42647447.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (74474629) 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, 37562 + ... + 39494.

It is an arithmetic number, because the mean of its divisors is an integer number (2712435).

Almost surely, 2^74474624 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 74474624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86797920).

74474624 is an abundant number, since it is smaller than the sum of its proper divisors (99121216).

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

74474624 is a wasteful number, since it uses less digits than its factorization.

74474624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997 (or 1985 counting only the distinct ones).

The product of its digits is 150528, while the sum is 38.

The square root of 74474624 is about 8629.8681334074. The cubic root of 74474624 is about 420.7293148486.

The spelling of 74474624 in words is "seventy-four million, four hundred seventy-four thousand, six hundred twenty-four".