42255728 has 20 divisors (see below), whose sum is σ = 84512448. Its totient is φ = 20446080.

The previous prime is 42255701. The next prime is 42255749. The reversal of 42255728 is 82755224.

42255728 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42101 + ... + 43092.

Almost surely, 2^42255728 is an apocalyptic number.

It is an amenable number.

42255728 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

42255728 is a wasteful number, since it uses less digits than its factorization.

42255728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85232 (or 85226 counting only the distinct ones).

The product of its digits is 44800, while the sum is 35.

The square root of 42255728 is about 6500.4406004516. The cubic root of 42255728 is about 348.3067274129.

The spelling of 42255728 in words is "forty-two million, two hundred fifty-five thousand, seven hundred twenty-eight".