252785470 has 32 divisors (see below), whose sum is σ = 536795136. Its totient is φ = 83872800.

The previous prime is 252785399. The next prime is 252785471. The reversal of 252785470 is 74587252.

It is a happy number.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252785471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56076 + ... + 60415.

It is an arithmetic number, because the mean of its divisors is an integer number (16774848).

Almost surely, 2^252785470 is an apocalyptic number.

252785470 is an abundant number, since it is smaller than the sum of its proper divisors (284009666).

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

252785470 is a wasteful number, since it uses less digits than its factorization.

252785470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116536.

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

The square root of 252785470 is about 15899.2285976396. The cubic root of 252785470 is about 632.2915371691.

The spelling of 252785470 in words is "two hundred fifty-two million, seven hundred eighty-five thousand, four hundred seventy".