252780028 has 24 divisors (see below), whose sum is σ = 485896320. Its totient is φ = 114531120.

The previous prime is 252780019. The next prime is 252780043. The reversal of 252780028 is 820087252.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 252779975 and 252780002.

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, 70558 + ... + 74053.

It is an arithmetic number, because the mean of its divisors is an integer number (20245680).

Almost surely, 2^252780028 is an apocalyptic number.

It is an amenable number.

252780028 is a deficient number, since it is larger than the sum of its proper divisors (233116292).

252780028 is a wasteful number, since it uses less digits than its factorization.

252780028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144657 (or 144655 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 252780028 is about 15899.0574563400. The cubic root of 252780028 is about 632.2869997838.

The spelling of 252780028 in words is "two hundred fifty-two million, seven hundred eighty thousand, twenty-eight".