256663422 has 24 divisors (see below), whose sum is σ = 561614040. Its totient is φ = 84706800.

The previous prime is 256663409. The next prime is 256663423. The reversal of 256663422 is 224366652.

It is a super-2 number, since 2×256663422² = 131752224385500168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256663423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68772 + ... + 72407.

It is an arithmetic number, because the mean of its divisors is an integer number (23400585).

Almost surely, 2^256663422 is an apocalyptic number.

256663422 is an abundant number, since it is smaller than the sum of its proper divisors (304950618).

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

256663422 is a wasteful number, since it uses less digits than its factorization.

256663422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141288 (or 141285 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 256663422 is about 16020.7185232124. The cubic root of 256663422 is about 635.5084459818.

The spelling of 256663422 in words is "two hundred fifty-six million, six hundred sixty-three thousand, four hundred twenty-two".