621444096 has 528 divisors, whose sum is σ = 2397446400. Its totient is φ = 155271168.

The previous prime is 621444091. The next prime is 621444113. The reversal of 621444096 is 690444126.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 621444096.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621444091) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32707575 + ... + 32707593.

Almost surely, 2^621444096 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 621444096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1198723200).

621444096 is an abundant number, since it is smaller than the sum of its proper divisors (1776002304).

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

621444096 is a wasteful number, since it uses less digits than its factorization.

621444096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 621444096 is about 24928.7804755868. The cubic root of 621444096 is about 853.3634190782.

The spelling of 621444096 in words is "six hundred twenty-one million, four hundred forty-four thousand, ninety-six".