670256 has 20 divisors (see below), whose sum is σ = 1311672. Its totient is φ = 331776.

The previous prime is 670249. The next prime is 670261. The reversal of 670256 is 652076.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 670256.

It is an unprimeable number.

670256 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2480 + ... + 2736.

2⁶⁷⁰²⁵⁶ is an apocalyptic number.

It is an amenable number.

670256 is a deficient number, since it is larger than the sum of its proper divisors (641416).

670256 is a wasteful number, since it uses less digits than its factorization.

670256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 670256 is about 818.6916391414. The cubic root of 670256 is about 87.5145445210.

The spelling of 670256 in words is "six hundred seventy thousand, two hundred fifty-six".