252857740 has 24 divisors (see below), whose sum is σ = 531558720. Its totient is φ = 101036928.

The previous prime is 252857729. The next prime is 252857789. The reversal of 252857740 is 47758252.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 252857693 and 252857702.

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 7 ways as a sum of consecutive naturals, for example, 14541 + ... + 26779.

It is an arithmetic number, because the mean of its divisors is an integer number (22148280).

Almost surely, 2^252857740 is an apocalyptic number.

252857740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252857740 is an abundant number, since it is smaller than the sum of its proper divisors (278700980).

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

252857740 is a wasteful number, since it uses less digits than its factorization.

252857740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13281 (or 13279 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 40.

The square root of 252857740 is about 15901.5011869949. The cubic root of 252857740 is about 632.3517876724.

The spelling of 252857740 in words is "two hundred fifty-two million, eight hundred fifty-seven thousand, seven hundred forty".