621367220 has 12 divisors (see below), whose sum is σ = 1304871204. Its totient is φ = 248546880.

The previous prime is 621367171. The next prime is 621367273. The reversal of 621367220 is 22763126.

It can be written as a sum of positive squares in 2 ways, for example, as 73994404 + 547372816 = 8602^2 + 23396^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15534161 + ... + 15534200.

It is an arithmetic number, because the mean of its divisors is an integer number (108739267).

Almost surely, 2^621367220 is an apocalyptic number.

It is an amenable number.

621367220 is an abundant number, since it is smaller than the sum of its proper divisors (683503984).

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

621367220 is a wasteful number, since it uses less digits than its factorization.

621367220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31068370 (or 31068368 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 621367220 is about 24927.2385153270. The cubic root of 621367220 is about 853.3282290683.

The spelling of 621367220 in words is "six hundred twenty-one million, three hundred sixty-seven thousand, two hundred twenty".