252440856 has 24 divisors (see below), whose sum is σ = 683694180. Its totient is φ = 84146928.

The previous prime is 252440809. The next prime is 252440857. The reversal of 252440856 is 658044252.

It is a happy number.

252440856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 252440856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252440857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1752990 + ... + 1753133.

Almost surely, 2^252440856 is an apocalyptic number.

It is an amenable number.

252440856 is an abundant number, since it is smaller than the sum of its proper divisors (431253324).

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

252440856 is a wasteful number, since it uses less digits than its factorization.

252440856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506135 (or 3506128 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 252440856 is about 15888.3874575112. The cubic root of 252440856 is about 632.0040791811.

The spelling of 252440856 in words is "two hundred fifty-two million, four hundred forty thousand, eight hundred fifty-six".