621442736 has 10 divisors (see below), whose sum is σ = 1204045332. Its totient is φ = 310721360.

The previous prime is 621442697. The next prime is 621442741. The reversal of 621442736 is 637244126.

It is a junction number, because it is equal to n+sod(n) for n = 621442696 and 621442705.

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 as a sum of consecutive naturals, namely, 19420070 + ... + 19420101.

Almost surely, 2^621442736 is an apocalyptic number.

It is an amenable number.

621442736 is a deficient number, since it is larger than the sum of its proper divisors (582602596).

621442736 is a wasteful number, since it uses less digits than its factorization.

621442736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38840179 (or 38840173 counting only the distinct ones).

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

The square root of 621442736 is about 24928.7531978637. The cubic root of 621442736 is about 853.3627965630.

The spelling of 621442736 in words is "six hundred twenty-one million, four hundred forty-two thousand, seven hundred thirty-six".