256135748 has 24 divisors (see below), whose sum is σ = 492567264. Its totient is φ = 115572800.

The previous prime is 256135739. The next prime is 256135769. The reversal of 256135748 is 847531652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15218 + ... + 27273.

It is an arithmetic number, because the mean of its divisors is an integer number (20523636).

Almost surely, 2^256135748 is an apocalyptic number.

It is an amenable number.

256135748 is a deficient number, since it is larger than the sum of its proper divisors (236431516).

256135748 is a wasteful number, since it uses less digits than its factorization.

256135748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42643 (or 42641 counting only the distinct ones).

The product of its digits is 201600, while the sum is 41.

The square root of 256135748 is about 16004.2415627858. The cubic root of 256135748 is about 635.0726335169.

The spelling of 256135748 in words is "two hundred fifty-six million, one hundred thirty-five thousand, seven hundred forty-eight".