252021798 has 72 divisors (see below), whose sum is σ = 639459288. Its totient is φ = 71523648.

The previous prime is 252021779. The next prime is 252021799. The reversal of 252021798 is 897120252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252021799) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 142890 + ... + 144642.

It is an arithmetic number, because the mean of its divisors is an integer number (8881379).

Almost surely, 2^252021798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 252021798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319729644).

252021798 is an abundant number, since it is smaller than the sum of its proper divisors (387437490).

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

252021798 is a wasteful number, since it uses less digits than its factorization.

252021798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938 (or 1928 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 252021798 is about 15875.1944240063. The cubic root of 252021798 is about 631.6541714107.

It can be divided in two parts, 25202 and 1798, that added together give a cube (27000 = 30³).

The spelling of 252021798 in words is "two hundred fifty-two million, twenty-one thousand, seven hundred ninety-eight".