621409850 has 12 divisors (see below), whose sum is σ = 1155822414. Its totient is φ = 248563920.

The previous prime is 621409807. The next prime is 621409853. The reversal of 621409850 is 58904126.

621409850 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 3 ways, for example, as 584333929 + 37075921 = 24173^2 + 6089^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 621409850.

It is not an unprimeable number, because it can be changed into a prime (621409853) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6214049 + ... + 6214148.

Almost surely, 2^621409850 is an apocalyptic number.

621409850 is a deficient number, since it is larger than the sum of its proper divisors (534412564).

621409850 is a wasteful number, since it uses less digits than its factorization.

621409850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12428209 (or 12428204 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 621409850 is about 24928.0935893622. The cubic root of 621409850 is about 853.3477433208.

The spelling of 621409850 in words is "six hundred twenty-one million, four hundred nine thousand, eight hundred fifty".