252709140 has 24 divisors (see below), whose sum is σ = 707585760. Its totient is φ = 67389088.

The previous prime is 252709129. The next prime is 252709207. The reversal of 252709140 is 41907252.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 252709098 and 252709107.

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, 2105850 + ... + 2105969.

It is an arithmetic number, because the mean of its divisors is an integer number (29482740).

Almost surely, 2^252709140 is an apocalyptic number.

252709140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252709140 is an abundant number, since it is smaller than the sum of its proper divisors (454876620).

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

252709140 is a wasteful number, since it uses less digits than its factorization.

252709140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4211831 (or 4211829 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 252709140 is about 15896.8279854819. The cubic root of 252709140 is about 632.2278894292.

The spelling of 252709140 in words is "two hundred fifty-two million, seven hundred nine thousand, one hundred forty".