74905688 has 64 divisors (see below), whose sum is σ = 169132320. Its totient is φ = 30643200.

The previous prime is 74905681. The next prime is 74905697. The reversal of 74905688 is 88650947.

It is a super-2 number, since 2×74905688² = 11221724189506688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74905681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46106 + ... + 47702.

Almost surely, 2^74905688 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 74905688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84566160).

74905688 is an abundant number, since it is smaller than the sum of its proper divisors (94226632).

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

74905688 is a wasteful number, since it uses less digits than its factorization.

74905688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668 (or 1664 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 74905688 is about 8654.8072191124. The cubic root of 74905688 is about 421.5394900117.

The spelling of 74905688 in words is "seventy-four million, nine hundred five thousand, six hundred eighty-eight".