256501674 has 128 divisors (see below), whose sum is σ = 682214400. Its totient is φ = 70407360.

The previous prime is 256501667. The next prime is 256501697. The reversal of 256501674 is 476105652.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 455317 + ... + 455879.

It is an arithmetic number, because the mean of its divisors is an integer number (5329800).

Almost surely, 2^256501674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256501674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341107200).

256501674 is an abundant number, since it is smaller than the sum of its proper divisors (425712726).

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

256501674 is a wasteful number, since it uses less digits than its factorization.

256501674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 256501674 is about 16015.6696394500. The cubic root of 256501674 is about 635.3749198513.

The spelling of 256501674 in words is "two hundred fifty-six million, five hundred one thousand, six hundred seventy-four".