256493402 has 8 divisors (see below), whose sum is σ = 419716512. Its totient is φ = 116587900.

The previous prime is 256493357. The next prime is 256493431. The reversal of 256493402 is 204394652.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5829374 + ... + 5829417.

It is an arithmetic number, because the mean of its divisors is an integer number (52464564).

Almost surely, 2^256493402 is an apocalyptic number.

256493402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

256493402 is a deficient number, since it is larger than the sum of its proper divisors (163223110).

256493402 is a wasteful number, since it uses less digits than its factorization.

256493402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11658804.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 256493402 is about 16015.4113902828. The cubic root of 256493402 is about 635.3680896453.

The spelling of 256493402 in words is "two hundred fifty-six million, four hundred ninety-three thousand, four hundred two".