256669224 has 32 divisors (see below), whose sum is σ = 733341120. Its totient is φ = 73334016.

The previous prime is 256669223. The next prime is 256669261. The reversal of 256669224 is 422966652.

256669224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (256669223) 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, 763729 + ... + 764064.

It is an arithmetic number, because the mean of its divisors is an integer number (22916910).

Almost surely, 2^256669224 is an apocalyptic number.

256669224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256669224 is an abundant number, since it is smaller than the sum of its proper divisors (476671896).

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

256669224 is a wasteful number, since it uses less digits than its factorization.

256669224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527809 (or 1527805 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The square root of 256669224 is about 16020.8996002097. The cubic root of 256669224 is about 635.5132346037.

The spelling of 256669224 in words is "two hundred fifty-six million, six hundred sixty-nine thousand, two hundred twenty-four".