253220868 has 36 divisors (see below), whose sum is σ = 642134220. Its totient is φ = 84136896.

The previous prime is 253220857. The next prime is 253220893. The reversal of 253220868 is 868022352.

It can be written as a sum of positive squares in 2 ways, for example, as 80245764 + 172975104 = 8958^2 + 13152^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 318 + ... + 22506.

Almost surely, 2^253220868 is an apocalyptic number.

It is an amenable number.

253220868 is an abundant number, since it is smaller than the sum of its proper divisors (388913352).

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

253220868 is a wasteful number, since it uses less digits than its factorization.

253220868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22516 (or 22511 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 253220868 is about 15912.9151320555. The cubic root of 253220868 is about 632.6543488498.

The spelling of 253220868 in words is "two hundred fifty-three million, two hundred twenty thousand, eight hundred sixty-eight".