252609140 has 48 divisors (see below), whose sum is σ = 627177600. Its totient is φ = 83620992.

The previous prime is 252609139. The next prime is 252609143. The reversal of 252609140 is 41906252.

It is a happy number.

It is a super-2 number, since 2×252609140² = 127622755223079200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252609143) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 27050 + ... + 35169.

It is an arithmetic number, because the mean of its divisors is an integer number (13066200).

Almost surely, 2^252609140 is an apocalyptic number.

252609140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252609140 is an abundant number, since it is smaller than the sum of its proper divisors (374568460).

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

252609140 is a wasteful number, since it uses less digits than its factorization.

252609140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62264 (or 62262 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 252609140 is about 15893.6823926993. The cubic root of 252609140 is about 632.1444850720.

The spelling of 252609140 in words is "two hundred fifty-two million, six hundred nine thousand, one hundred forty".