252243720 has 96 divisors (see below), whose sum is σ = 850187520. Its totient is φ = 67262400.

The previous prime is 252243709. The next prime is 252243743. The reversal of 252243720 is 27342252.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 23 ways as a sum of consecutive naturals, for example, 3256 + ... + 22695.

It is an arithmetic number, because the mean of its divisors is an integer number (8856120).

Almost surely, 2^252243720 is an apocalyptic number.

252243720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 252243720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (425093760).

252243720 is an abundant number, since it is smaller than the sum of its proper divisors (597943800).

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

252243720 is a wasteful number, since it uses less digits than its factorization.

252243720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25977 (or 25961 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 252243720 is about 15882.1824696734. The cubic root of 252243720 is about 631.8395215576.

Adding to 252243720 its reverse (27342252), we get a palindrome (279585972).

The spelling of 252243720 in words is "two hundred fifty-two million, two hundred forty-three thousand, seven hundred twenty".