621420980 has 24 divisors (see below), whose sum is σ = 1324464288. Its totient is φ = 244857888.

The previous prime is 621420979. The next prime is 621421057. The reversal of 621420980 is 89024126.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230534 + ... + 233213.

It is an arithmetic number, because the mean of its divisors is an integer number (55186012).

Almost surely, 2^621420980 is an apocalyptic number.

It is an amenable number.

621420980 is an abundant number, since it is smaller than the sum of its proper divisors (703043308).

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

621420980 is a wasteful number, since it uses less digits than its factorization.

621420980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463823 (or 463821 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 621420980 is about 24928.3168304641. The cubic root of 621420980 is about 853.3528380280.

The spelling of 621420980 in words is "six hundred twenty-one million, four hundred twenty thousand, nine hundred eighty".