252666140 has 24 divisors (see below), whose sum is σ = 537870480. Its totient is φ = 99681408.

The previous prime is 252666133. The next prime is 252666181. The reversal of 252666140 is 41666252.

252666140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 252666097 and 252666106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85070 + ... + 87989.

It is an arithmetic number, because the mean of its divisors is an integer number (22411270).

Almost surely, 2^252666140 is an apocalyptic number.

252666140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252666140 is an abundant number, since it is smaller than the sum of its proper divisors (285204340).

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

252666140 is a wasteful number, since it uses less digits than its factorization.

252666140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173141 (or 173139 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 252666140 is about 15895.4754568714. The cubic root of 252666140 is about 632.1920282525.

The spelling of 252666140 in words is "two hundred fifty-two million, six hundred sixty-six thousand, one hundred forty".