621620984 has 8 divisors (see below), whose sum is σ = 1165539360. Its totient is φ = 310810488.

The previous prime is 621620969. The next prime is 621620999. The reversal of 621620984 is 489026126.

621620984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (621620969) and next prime (621620999).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38851304 + ... + 38851319.

It is an arithmetic number, because the mean of its divisors is an integer number (145692420).

Almost surely, 2^621620984 is an apocalyptic number.

It is an amenable number.

621620984 is a deficient number, since it is larger than the sum of its proper divisors (543918376).

621620984 is a wasteful number, since it uses less digits than its factorization.

621620984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77702629 (or 77702625 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 621620984 is about 24932.3280902526. The cubic root of 621620984 is about 853.4443785882. Note that the first 3 decimals are identical.

The spelling of 621620984 in words is "six hundred twenty-one million, six hundred twenty thousand, nine hundred eighty-four".