256425432 has 32 divisors (see below), whose sum is σ = 641461680. Its totient is φ = 85422080.

The previous prime is 256425419. The next prime is 256425437. The reversal of 256425432 is 234524652.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 256425393 and 256425402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256425437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64132 + ... + 68012.

Almost surely, 2^256425432 is an apocalyptic number.

It is an amenable number.

256425432 is an abundant number, since it is smaller than the sum of its proper divisors (385036248).

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

256425432 is a wasteful number, since it uses less digits than its factorization.

256425432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6643 (or 6639 counting only the distinct ones).

The product of its digits is 57600, while the sum is 33.

The square root of 256425432 is about 16013.2892311355. The cubic root of 256425432 is about 635.3119611264.

The spelling of 256425432 in words is "two hundred fifty-six million, four hundred twenty-five thousand, four hundred thirty-two".