256430487 has 8 divisors (see below), whose sum is σ = 346723200. Its totient is φ = 168545720.

The previous prime is 256430477. The next prime is 256430497. The reversal of 256430487 is 784034652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (256430477) and next prime (256430497).

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

It is a cyclic number.

It is not a de Polignac number, because 256430487 - 2⁶ = 256430423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256430407) 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, 601737 + ... + 602162.

It is an arithmetic number, because the mean of its divisors is an integer number (43340400).

Almost surely, 2^256430487 is an apocalyptic number.

256430487 is a deficient number, since it is larger than the sum of its proper divisors (90292713).

256430487 is a wasteful number, since it uses less digits than its factorization.

256430487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203973.

The product of its (nonzero) digits is 161280, while the sum is 39.

The square root of 256430487 is about 16013.4470680113. The cubic root of 256430487 is about 635.3161358044.

The spelling of 256430487 in words is "two hundred fifty-six million, four hundred thirty thousand, four hundred eighty-seven".