256693074 has 16 divisors (see below), whose sum is σ = 560057760. Its totient is φ = 77785760.

The previous prime is 256693057. The next prime is 256693079. The reversal of 256693074 is 470396652.

It is not an unprimeable number, because it can be changed into a prime (256693079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1944579 + ... + 1944710.

It is an arithmetic number, because the mean of its divisors is an integer number (35003610).

Almost surely, 2^256693074 is an apocalyptic number.

256693074 is an abundant number, since it is smaller than the sum of its proper divisors (303364686).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256693074 is a wasteful number, since it uses less digits than its factorization.

256693074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3889305.

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 256693074 is about 16021.6439231435. The cubic root of 256693074 is about 635.5329182013.

The spelling of 256693074 in words is "two hundred fifty-six million, six hundred ninety-three thousand, seventy-four".