621974736 has 120 divisors (see below), whose sum is σ = 1806071904. Its totient is φ = 199653120.

The previous prime is 621974729. The next prime is 621974777. The reversal of 621974736 is 637479126.

It is a junction number, because it is equal to n+sod(n) for n = 621974691 and 621974700.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 569551 + ... + 570641.

Almost surely, 2^621974736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621974736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903035952).

621974736 is an abundant number, since it is smaller than the sum of its proper divisors (1184097168).

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

621974736 is a wasteful number, since it uses less digits than its factorization.

621974736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249 (or 1240 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 621974736 is about 24939.4213244814. The cubic root of 621974736 is about 853.6062405651.

The spelling of 621974736 in words is "six hundred twenty-one million, nine hundred seventy-four thousand, seven hundred thirty-six".