256616402 has 8 divisors (see below), whose sum is σ = 439913856. Its totient is φ = 109978452.

The previous prime is 256616351. The next prime is 256616441. The reversal of 256616402 is 204616652.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9164858 + ... + 9164885.

It is an arithmetic number, because the mean of its divisors is an integer number (54989232).

Almost surely, 2^256616402 is an apocalyptic number.

256616402 is a deficient number, since it is larger than the sum of its proper divisors (183297454).

256616402 is a wasteful number, since it uses less digits than its factorization.

256616402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18329752.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 256616402 is about 16019.2509812413. The cubic root of 256616402 is about 635.4696358392.

The spelling of 256616402 in words is "two hundred fifty-six million, six hundred sixteen thousand, four hundred two".