256808652 has 24 divisors (see below), whose sum is σ = 603246000. Its totient is φ = 85027776.

The previous prime is 256808641. The next prime is 256808653.

256808652 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (256808653) 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, 70027 + ... + 73602.

It is an arithmetic number, because the mean of its divisors is an integer number (25135250).

Almost surely, 2^256808652 is an apocalyptic number.

It is an amenable number.

256808652 is an abundant number, since it is smaller than the sum of its proper divisors (346437348).

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

256808652 is a wasteful number, since it uses less digits than its factorization.

256808652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143785 (or 143783 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 256808652 is about 16025.2504504610. The cubic root of 256808652 is about 635.6282883917.

The spelling of 256808652 in words is "two hundred fifty-six million, eight hundred eight thousand, six hundred fifty-two".