425642728 has 32 divisors (see below), whose sum is σ = 924946560. Its totient is φ = 179847360.

The previous prime is 425642713. The next prime is 425642747. The reversal of 425642728 is 827246524.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49551 + ... + 57502.

It is an arithmetic number, because the mean of its divisors is an integer number (28904580).

Almost surely, 2^425642728 is an apocalyptic number.

It is an amenable number.

425642728 is an abundant number, since it is smaller than the sum of its proper divisors (499303832).

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

425642728 is a wasteful number, since it uses less digits than its factorization.

425642728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107137 (or 107133 counting only the distinct ones).

The product of its digits is 215040, while the sum is 40.

The square root of 425642728 is about 20631.1106826559. The cubic root of 425642728 is about 752.2261137233.

The spelling of 425642728 in words is "four hundred twenty-five million, six hundred forty-two thousand, seven hundred twenty-eight".