252632778 has 64 divisors (see below), whose sum is σ = 544320000. Its totient is φ = 77937984.

The previous prime is 252632777. The next prime is 252632791. The reversal of 252632778 is 877236252.

It is not an unprimeable number, because it can be changed into a prime (252632773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1695448 + ... + 1695596.

It is an arithmetic number, because the mean of its divisors is an integer number (8505000).

Almost surely, 2^252632778 is an apocalyptic number.

252632778 is an abundant number, since it is smaller than the sum of its proper divisors (291687222).

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

252632778 is a wasteful number, since it uses less digits than its factorization.

252632778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419.

The product of its digits is 282240, while the sum is 42.

The square root of 252632778 is about 15894.4260041060. The cubic root of 252632778 is about 632.1642021803.

The spelling of 252632778 in words is "two hundred fifty-two million, six hundred thirty-two thousand, seven hundred seventy-eight".