621601280 has 40 divisors (see below), whose sum is σ = 1490392332. Its totient is φ = 248639488.

The previous prime is 621601271. The next prime is 621601291. The reversal of 621601280 is 82106126.

It can be written as a sum of positive squares in 2 ways, for example, as 531579136 + 90022144 = 23056^2 + 9488^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 118847 + ... + 123966.

Almost surely, 2^621601280 is an apocalyptic number.

It is an amenable number.

621601280 is an abundant number, since it is smaller than the sum of its proper divisors (868791052).

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

621601280 is an equidigital number, since it uses as much as digits as its factorization.

621601280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242836 (or 242820 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 621601280 is about 24931.9329375001. The cubic root of 621601280 is about 853.4353610646.

The spelling of 621601280 in words is "six hundred twenty-one million, six hundred one thousand, two hundred eighty".