621764234 has 48 divisors (see below), whose sum is σ = 1208730600. Its totient is φ = 237476736.

The previous prime is 621764203. The next prime is 621764257. The reversal of 621764234 is 432467126.

621764234 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 241709209 + 380055025 = 15547^2 + 19495^2 .

It is a junction number, because it is equal to n+sod(n) for n = 621764194 and 621764203.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28532 + ... + 45360.

Almost surely, 2^621764234 is an apocalyptic number.

621764234 is a deficient number, since it is larger than the sum of its proper divisors (586966366).

621764234 is a wasteful number, since it uses less digits than its factorization.

621764234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16887 (or 16880 counting only the distinct ones).

The product of its digits is 48384, while the sum is 35.

The square root of 621764234 is about 24935.2007010170. The cubic root of 621764234 is about 853.5099311357.

The spelling of 621764234 in words is "six hundred twenty-one million, seven hundred sixty-four thousand, two hundred thirty-four".