256707654 has 32 divisors (see below), whose sum is σ = 587298816. Its totient is φ = 73277760.

The previous prime is 256707653. The next prime is 256707677. The reversal of 256707654 is 456707652.

It is a Harshad number since it is a multiple of its sum of digits (42).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256707653) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 60139 + ... + 64265.

It is an arithmetic number, because the mean of its divisors is an integer number (18353088).

Almost surely, 2^256707654 is an apocalyptic number.

256707654 is an abundant number, since it is smaller than the sum of its proper divisors (330591162).

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

256707654 is a wasteful number, since it uses less digits than its factorization.

256707654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5620.

The product of its (nonzero) digits is 352800, while the sum is 42.

The square root of 256707654 is about 16022.0989261707. The cubic root of 256707654 is about 635.5449505926.

The spelling of 256707654 in words is "two hundred fifty-six million, seven hundred seven thousand, six hundred fifty-four".