74428632 has 40 divisors (see below), whose sum is σ = 208470900. Its totient is φ = 24809328.

The previous prime is 74428619. The next prime is 74428633. The reversal of 74428632 is 23682447.

It is a super-2 number, since 2×74428632² = 11079242522782848, 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 (74428633) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 56782 + ... + 58077.

Almost surely, 2^74428632 is an apocalyptic number.

74428632 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

74428632 is an abundant number, since it is smaller than the sum of its proper divisors (134042268).

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

74428632 is a wasteful number, since it uses less digits than its factorization.

74428632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114877 (or 114864 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 74428632 is about 8627.2030229965. The cubic root of 74428632 is about 420.6426895158.

The spelling of 74428632 in words is "seventy-four million, four hundred twenty-eight thousand, six hundred thirty-two".