428057632 has 24 divisors (see below), whose sum is σ = 871800300. Its totient is φ = 206648064.

The previous prime is 428057611. The next prime is 428057633. The reversal of 428057632 is 236750824.

It can be written as a sum of positive squares in 2 ways, for example, as 411116176 + 16941456 = 20276^2 + 4116^2 .

It is a junction number, because it is equal to n+sod(n) for n = 428057591 and 428057600.

It is not an unprimeable number, because it can be changed into a prime (428057633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229707 + ... + 231562.

Almost surely, 2^428057632 is an apocalyptic number.

It is an amenable number.

428057632 is an abundant number, since it is smaller than the sum of its proper divisors (443742668).

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

428057632 is a wasteful number, since it uses less digits than its factorization.

428057632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461308 (or 461300 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 428057632 is about 20689.5536926247. The cubic root of 428057632 is about 753.6460285053.

The spelling of 428057632 in words is "four hundred twenty-eight million, fifty-seven thousand, six hundred thirty-two".