74393631 has 36 divisors (see below), whose sum is σ = 118474200. Its totient is φ = 44950464.

The previous prime is 74393611. The next prime is 74393681. The reversal of 74393631 is 13639347.

It is not a de Polignac number, because 74393631 - 2²⁵ = 40839199 is a prime.

It is a super-2 number, since 2×74393631² = 11068824666728322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74393611) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 89325 + ... + 90153.

It is an arithmetic number, because the mean of its divisors is an integer number (3290950).

Almost surely, 2^74393631 is an apocalyptic number.

74393631 is a deficient number, since it is larger than the sum of its proper divisors (44080569).

74393631 is a wasteful number, since it uses less digits than its factorization.

74393631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920 (or 904 counting only the distinct ones).

The product of its digits is 40824, while the sum is 36.

The square root of 74393631 is about 8625.1742591092. The cubic root of 74393631 is about 420.5767416726.

The spelling of 74393631 in words is "seventy-four million, three hundred ninety-three thousand, six hundred thirty-one".