621706330 has 32 divisors (see below), whose sum is σ = 1334548224. Its totient is φ = 203888256.

The previous prime is 621706297. The next prime is 621706357. The reversal of 621706330 is 33607126.

621706330 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191467 + ... + 194686.

It is an arithmetic number, because the mean of its divisors is an integer number (41704632).

Almost surely, 2^621706330 is an apocalyptic number.

621706330 is an abundant number, since it is smaller than the sum of its proper divisors (712841894).

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

621706330 is a wasteful number, since it uses less digits than its factorization.

621706330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386190.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 621706330 is about 24934.0395844717. The cubic root of 621706330 is about 853.4834349332.

The spelling of 621706330 in words is "six hundred twenty-one million, seven hundred six thousand, three hundred thirty".