256663224 has 96 divisors (see below), whose sum is σ = 728254800. Its totient is φ = 81553920.

The previous prime is 256663219. The next prime is 256663241. The reversal of 256663224 is 422366652.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172564 + ... + 174044.

Almost surely, 2^256663224 is an apocalyptic number.

256663224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256663224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (364127400).

256663224 is an abundant number, since it is smaller than the sum of its proper divisors (471591576).

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

256663224 is a wasteful number, since it uses less digits than its factorization.

256663224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605 (or 1598 counting only the distinct ones).

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

The square root of 256663224 is about 16020.7123437131. The cubic root of 256663224 is about 635.5082825633.

The spelling of 256663224 in words is "two hundred fifty-six million, six hundred sixty-three thousand, two hundred twenty-four".