252231840 has 384 divisors, whose sum is σ = 1064448000. Its totient is φ = 54494208.

The previous prime is 252231809. The next prime is 252231853. The reversal of 252231840 is 48132252.

It is a super-2 number, since 2×252231840² = 127241802219571200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 574341 + ... + 574779.

It is an arithmetic number, because the mean of its divisors is an integer number (2772000).

Almost surely, 2^252231840 is an apocalyptic number.

252231840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 252231840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532224000).

252231840 is an abundant number, since it is smaller than the sum of its proper divisors (812216160).

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

252231840 is a wasteful number, since it uses less digits than its factorization.

252231840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 252231840 is about 15881.8084612553. The cubic root of 252231840 is about 631.8296020885.

The spelling of 252231840 in words is "two hundred fifty-two million, two hundred thirty-one thousand, eight hundred forty".