256535436 has 48 divisors (see below), whose sum is σ = 608509440. Its totient is φ = 84102720.

The previous prime is 256535417. The next prime is 256535443. The reversal of 256535436 is 634535652.

It is a junction number, because it is equal to n+sod(n) for n = 256535394 and 256535403.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436735 + ... + 437321.

It is an arithmetic number, because the mean of its divisors is an integer number (12677280).

Almost surely, 2^256535436 is an apocalyptic number.

It is an amenable number.

256535436 is an abundant number, since it is smaller than the sum of its proper divisors (351974004).

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

256535436 is a wasteful number, since it uses less digits than its factorization.

256535436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134 (or 1132 counting only the distinct ones).

The product of its digits is 324000, while the sum is 39.

The square root of 256535436 is about 16016.7236350010. The cubic root of 256535436 is about 635.4027956758.

The spelling of 256535436 in words is "two hundred fifty-six million, five hundred thirty-five thousand, four hundred thirty-six".