256470502 has 16 divisors (see below), whose sum is σ = 398886912. Its totient is φ = 123545160.

The previous prime is 256470481. The next prime is 256470503. The reversal of 256470502 is 205074652.

It is a super-2 number, since 2×256470502² = 131554236792264008, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256470503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4963 + ... + 23185.

It is an arithmetic number, because the mean of its divisors is an integer number (24930432).

Almost surely, 2^256470502 is an apocalyptic number.

256470502 is a deficient number, since it is larger than the sum of its proper divisors (142416410).

256470502 is a wasteful number, since it uses less digits than its factorization.

256470502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18483.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 256470502 is about 16014.6964379597. The cubic root of 256470502 is about 635.3491803060.

The spelling of 256470502 in words is "two hundred fifty-six million, four hundred seventy thousand, five hundred two".