74542428 has 36 divisors (see below), whose sum is σ = 193026288. Its totient is φ = 24240960.

The previous prime is 74542409. The next prime is 74542493. The reversal of 74542428 is 82424547.

74542428 is a `hidden beast` number, since 74 + 542 + 42 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 74542392 and 74542401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23776 + ... + 26727.

Almost surely, 2^74542428 is an apocalyptic number.

It is an amenable number.

74542428 is an abundant number, since it is smaller than the sum of its proper divisors (118483860).

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

74542428 is a wasteful number, since it uses less digits than its factorization.

74542428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50554 (or 50549 counting only the distinct ones).

The product of its digits is 71680, while the sum is 36.

The square root of 74542428 is about 8633.7956890350. The cubic root of 74542428 is about 420.8569577780.

The spelling of 74542428 in words is "seventy-four million, five hundred forty-two thousand, four hundred twenty-eight".