256343592 has 64 divisors (see below), whose sum is σ = 676411200. Its totient is φ = 80732160.

The previous prime is 256343587. The next prime is 256343599. The reversal of 256343592 is 295343652.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 256343592.

It is not an unprimeable number, because it can be changed into a prime (256343599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291858 + ... + 292734.

It is an arithmetic number, because the mean of its divisors is an integer number (10568925).

Almost surely, 2^256343592 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 256343592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338205600).

256343592 is an abundant number, since it is smaller than the sum of its proper divisors (420067608).

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

256343592 is a wasteful number, since it uses less digits than its factorization.

256343592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546 (or 1542 counting only the distinct ones).

The product of its digits is 194400, while the sum is 39.

The square root of 256343592 is about 16010.7336496489. The cubic root of 256343592 is about 635.2443658247.

The spelling of 256343592 in words is "two hundred fifty-six million, three hundred forty-three thousand, five hundred ninety-two".