74656404 has 72 divisors (see below), whose sum is σ = 198132480. Its totient is φ = 24577344.

The previous prime is 74656403. The next prime is 74656409. The reversal of 74656404 is 40465647.

74656404 is a `hidden beast` number, since 7 + 4 + 6 + 5 + 640 + 4 = 666.

It is a super-2 number, since 2×74656404² = 11147157316422432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74656403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86077 + ... + 86939.

It is an arithmetic number, because the mean of its divisors is an integer number (2751840).

Almost surely, 2^74656404 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 74656404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99066240).

74656404 is an abundant number, since it is smaller than the sum of its proper divisors (123476076).

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

74656404 is a wasteful number, since it uses less digits than its factorization.

74656404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 74656404 is about 8640.3937410282. The cubic root of 74656404 is about 421.0713464916.

The spelling of 74656404 in words is "seventy-four million, six hundred fifty-six thousand, four hundred four".