256415074 has 16 divisors (see below), whose sum is σ = 398635776. Its totient is φ = 123570000.

The previous prime is 256415059. The next prime is 256415087. The reversal of 256415074 is 470514652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7324 + ... + 23800.

It is an arithmetic number, because the mean of its divisors is an integer number (24914736).

Almost surely, 2^256415074 is an apocalyptic number.

256415074 is a deficient number, since it is larger than the sum of its proper divisors (142220702).

256415074 is a wasteful number, since it uses less digits than its factorization.

256415074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16761.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 256415074 is about 16012.9658089937. The cubic root of 256415074 is about 635.3034067878.

The spelling of 256415074 in words is "two hundred fifty-six million, four hundred fifteen thousand, seventy-four".