621347680 has 24 divisors (see below), whose sum is σ = 1467934272. Its totient is φ = 248539008.

The previous prime is 621347677. The next prime is 621347681. The reversal of 621347680 is 86743126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621347681) 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, 1941552 + ... + 1941871.

It is an arithmetic number, because the mean of its divisors is an integer number (61163928).

Almost surely, 2^621347680 is an apocalyptic number.

It is an amenable number.

621347680 is an abundant number, since it is smaller than the sum of its proper divisors (846586592).

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

621347680 is a wasteful number, since it uses less digits than its factorization.

621347680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3883438 (or 3883430 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 621347680 is about 24926.8465715180. The cubic root of 621347680 is about 853.3192841654.

The spelling of 621347680 in words is "six hundred twenty-one million, three hundred forty-seven thousand, six hundred eighty".