621090252 has 72 divisors (see below), whose sum is σ = 1669266144. Its totient is φ = 194278656.

The previous prime is 621090163. The next prime is 621090269. The reversal of 621090252 is 252090126.

It is a super-2 number, since 2×621090252² = 771506202258847008, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36808 + ... + 50960.

It is an arithmetic number, because the mean of its divisors is an integer number (23184252).

Almost surely, 2^621090252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621090252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (834633072).

621090252 is an abundant number, since it is smaller than the sum of its proper divisors (1048175892).

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

621090252 is a wasteful number, since it uses less digits than its factorization.

621090252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14239 (or 14234 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 621090252 is about 24921.6823669671. The cubic root of 621090252 is about 853.2014228202.

The spelling of 621090252 in words is "six hundred twenty-one million, ninety thousand, two hundred fifty-two".