621302980 has 12 divisors (see below), whose sum is σ = 1304736300. Its totient is φ = 248521184.

The previous prime is 621302947. The next prime is 621302987. The reversal of 621302980 is 89203126.

It can be written as a sum of positive squares in 2 ways, for example, as 456591424 + 164711556 = 21368^2 + 12834^2 .

It is not an unprimeable number, because it can be changed into a prime (621302987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15532555 + ... + 15532594.

It is an arithmetic number, because the mean of its divisors is an integer number (108728025).

Almost surely, 2^621302980 is an apocalyptic number.

It is an amenable number.

621302980 is an abundant number, since it is smaller than the sum of its proper divisors (683433320).

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

621302980 is a wasteful number, since it uses less digits than its factorization.

621302980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31065158 (or 31065156 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 621302980 is about 24925.9499317478. The cubic root of 621302980 is about 853.2988209648.

It can be divided in two parts, 621 and 302980, that added together give a square (303601 = 551²).

The spelling of 621302980 in words is "six hundred twenty-one million, three hundred two thousand, nine hundred eighty".