74420928 has 84 divisors (see below), whose sum is σ = 217932000. Its totient is φ = 24270336.

The previous prime is 74420897. The next prime is 74420953. The reversal of 74420928 is 82902447.

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 = 74420892 and 74420901.

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, 25698 + ... + 28446.

It is a vampire number, since it can be written as 8247 ⋅ 9024 (with its own digits).

Almost surely, 2^74420928 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 74420928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108966000).

74420928 is an abundant number, since it is smaller than the sum of its proper divisors (143511072).

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

74420928 is a wasteful number, since it uses less digits than its factorization.

74420928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814 (or 2801 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 74420928 is about 8626.7565167912. The cubic root of 74420928 is about 420.6281756430.

The spelling of 74420928 in words is "seventy-four million, four hundred twenty thousand, nine hundred twenty-eight".