252398740 has 36 divisors (see below), whose sum is σ = 582608628. Its totient is φ = 91780480.

The previous prime is 252398737. The next prime is 252398761. The reversal of 252398740 is 47893252.

It can be written as a sum of positive squares in 2 ways, for example, as 120516484 + 131882256 = 10978^2 + 11484^2 .

It is a junction number, because it is equal to n+sod(n) for n = 252398693 and 252398702.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 49729 + ... + 54568.

It is an arithmetic number, because the mean of its divisors is an integer number (16183573).

Almost surely, 2^252398740 is an apocalyptic number.

252398740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252398740 is an abundant number, since it is smaller than the sum of its proper divisors (330209888).

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

252398740 is a wasteful number, since it uses less digits than its factorization.

252398740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104328 (or 104315 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 252398740 is about 15887.0620317288. The cubic root of 252398740 is about 631.9689304013.

The spelling of 252398740 in words is "two hundred fifty-two million, three hundred ninety-eight thousand, seven hundred forty".