256607494 has 16 divisors (see below), whose sum is σ = 452203920. Its totient is φ = 107667360.

The previous prime is 256607489. The next prime is 256607509. The reversal of 256607494 is 494706652.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 256607494.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 448329 + ... + 448900.

It is an arithmetic number, because the mean of its divisors is an integer number (28262745).

Almost surely, 2^256607494 is an apocalyptic number.

256607494 is a deficient number, since it is larger than the sum of its proper divisors (195596426).

256607494 is a wasteful number, since it uses less digits than its factorization.

256607494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897255.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 256607494 is about 16018.9729383628. The cubic root of 256607494 is about 635.4622826732.

The spelling of 256607494 in words is "two hundred fifty-six million, six hundred seven thousand, four hundred ninety-four".