256864502 has 8 divisors (see below), whose sum is σ = 389626200. Its totient is φ = 126989104.

The previous prime is 256864501. The next prime is 256864547. The reversal of 256864502 is 205468652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256864501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721352 + ... + 721707.

It is an arithmetic number, because the mean of its divisors is an integer number (48703275).

Almost surely, 2^256864502 is an apocalyptic number.

256864502 is a deficient number, since it is larger than the sum of its proper divisors (132761698).

256864502 is a wasteful number, since it uses less digits than its factorization.

256864502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443150.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 256864502 is about 16026.9929181990. The cubic root of 256864502 is about 635.6743632500.

The spelling of 256864502 in words is "two hundred fifty-six million, eight hundred sixty-four thousand, five hundred two".