253868394 has 32 divisors (see below), whose sum is σ = 548501184. Its totient is φ = 77869440.

The previous prime is 253868389. The next prime is 253868413. The reversal of 253868394 is 493868352.

It is a super-2 number, since 2×253868394² = 128898322944278472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20902 + ... + 30734.

It is an arithmetic number, because the mean of its divisors is an integer number (17140662).

Almost surely, 2^253868394 is an apocalyptic number.

253868394 is an abundant number, since it is smaller than the sum of its proper divisors (294632790).

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

253868394 is a wasteful number, since it uses less digits than its factorization.

253868394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10182.

The product of its digits is 1244160, while the sum is 48.

The square root of 253868394 is about 15933.2480681122. The cubic root of 253868394 is about 633.1931557415.

The spelling of 253868394 in words is "two hundred fifty-three million, eight hundred sixty-eight thousand, three hundred ninety-four".