621120436 has 12 divisors (see below), whose sum is σ = 1100720320. Its totient is φ = 306628920.

The previous prime is 621120421. The next prime is 621120491. The reversal of 621120436 is 634021126.

It is a self number, because there is not a number n which added to its sum of digits gives 621120436.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982470 + ... + 983101.

Almost surely, 2^621120436 is an apocalyptic number.

It is an amenable number.

621120436 is a deficient number, since it is larger than the sum of its proper divisors (479599884).

621120436 is a wasteful number, since it uses less digits than its factorization.

621120436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965654 (or 1965652 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 621120436 is about 24922.2879367044. The cubic root of 621120436 is about 853.2152440077.

The spelling of 621120436 in words is "six hundred twenty-one million, one hundred twenty thousand, four hundred thirty-six".