253843842 has 64 divisors (see below), whose sum is σ = 597196800. Its totient is φ = 70435200.

The previous prime is 253843823. The next prime is 253843861. The reversal of 253843842 is 248348352.

It is an interprime number because it is at equal distance from previous prime (253843823) and next prime (253843861).

It is a super-2 number, since 2×253843842² = 128873392242641928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 253843842.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219967 + ... + 221117.

It is an arithmetic number, because the mean of its divisors is an integer number (9331200).

Almost surely, 2^253843842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253843842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298598400).

253843842 is an abundant number, since it is smaller than the sum of its proper divisors (343352958).

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

253843842 is a wasteful number, since it uses less digits than its factorization.

253843842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1311.

The product of its digits is 184320, while the sum is 39.

The square root of 253843842 is about 15932.4775851090. The cubic root of 253843842 is about 633.1727427245.

The spelling of 253843842 in words is "two hundred fifty-three million, eight hundred forty-three thousand, eight hundred forty-two".