256444402 has 8 divisors (see below), whose sum is σ = 384734700. Its totient is φ = 128199504.

The previous prime is 256444393. The next prime is 256444459. The reversal of 256444402 is 204444652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 249987721 + 6456681 = 15811^2 + 2541^2 .

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, 15124 + ... + 27232.

Almost surely, 2^256444402 is an apocalyptic number.

256444402 is a deficient number, since it is larger than the sum of its proper divisors (128290298).

256444402 is a wasteful number, since it uses less digits than its factorization.

256444402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22700.

The product of its (nonzero) digits is 30720, while the sum is 31.

The square root of 256444402 is about 16013.8815407134. The cubic root of 256444402 is about 635.3276272411.

The spelling of 256444402 in words is "two hundred fifty-six million, four hundred forty-four thousand, four hundred two".