253439956 has 60 divisors (see below), whose sum is σ = 564681600. Its totient is φ = 98701680.

The previous prime is 253439947. The next prime is 253439957. The reversal of 253439956 is 659934352.

It is a super-2 number, since 2×253439956² = 128463622594563872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253439957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 104445 + ... + 106843.

It is an arithmetic number, because the mean of its divisors is an integer number (9411360).

Almost surely, 2^253439956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253439956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282340800).

253439956 is an abundant number, since it is smaller than the sum of its proper divisors (311241644).

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

253439956 is a wasteful number, since it uses less digits than its factorization.

253439956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2442 (or 2419 counting only the distinct ones).

The product of its digits is 874800, while the sum is 46.

The square root of 253439956 is about 15919.7976117789. The cubic root of 253439956 is about 632.8367548547.

The spelling of 253439956 in words is "two hundred fifty-three million, four hundred thirty-nine thousand, nine hundred fifty-six".