256383634 has 8 divisors (see below), whose sum is σ = 414158220. Its totient is φ = 118330896.

The previous prime is 256383629. The next prime is 256383649. The reversal of 256383634 is 436383652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 252905409 + 3478225 = 15903^2 + 1865^2 .

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

It is an alternating number because its digits alternate between even and odd.

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, 4930429 + ... + 4930480.

Almost surely, 2^256383634 is an apocalyptic number.

256383634 is a deficient number, since it is larger than the sum of its proper divisors (157774586).

256383634 is a wasteful number, since it uses less digits than its factorization.

256383634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9860924.

The product of its digits is 311040, while the sum is 40.

The square root of 256383634 is about 16011.9840744362. The cubic root of 256383634 is about 635.2774400935.

The spelling of 256383634 in words is "two hundred fifty-six million, three hundred eighty-three thousand, six hundred thirty-four".