256996946 has 8 divisors (see below), whose sum is σ = 388531200. Its totient is φ = 127486548.

The previous prime is 256996937. The next prime is 256996981. The reversal of 256996946 is 649699652.

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

It is a junction number, because it is equal to n+sod(n) for n = 256996891 and 256996900.

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, 505646 + ... + 506153.

It is an arithmetic number, because the mean of its divisors is an integer number (48566400).

Almost surely, 2^256996946 is an apocalyptic number.

256996946 is a deficient number, since it is larger than the sum of its proper divisors (131534254).

256996946 is a wasteful number, since it uses less digits than its factorization.

256996946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011928.

The product of its digits is 6298560, while the sum is 56.

The square root of 256996946 is about 16031.1242899555. The cubic root of 256996946 is about 635.7835995577.

The spelling of 256996946 in words is "two hundred fifty-six million, nine hundred ninety-six thousand, nine hundred forty-six".