256432536 has 96 divisors (see below), whose sum is σ = 708879600. Its totient is φ = 83731200.

The previous prime is 256432481. The next prime is 256432541. The reversal of 256432536 is 635234652.

256432536 is a `hidden beast` number, since 2 + 5 + 643 + 2 + 5 + 3 + 6 = 666.

256432536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 256432536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1301590 + ... + 1301786.

Almost surely, 2^256432536 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 256432536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354439800).

256432536 is an abundant number, since it is smaller than the sum of its proper divisors (452447064).

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

256432536 is a wasteful number, since it uses less digits than its factorization.

256432536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 482 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

The square root of 256432536 is about 16013.5110453642. The cubic root of 256432536 is about 635.3178279580.

The spelling of 256432536 in words is "two hundred fifty-six million, four hundred thirty-two thousand, five hundred thirty-six".