621444126 has 8 divisors (see below), whose sum is σ = 1242888264. Its totient is φ = 207148040.

The previous prime is 621444113. The next prime is 621444137.

It is a happy number.

621444126 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

621444126 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 621444093 and 621444102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51787005 + ... + 51787016.

It is an arithmetic number, because the mean of its divisors is an integer number (155361033).

Almost surely, 2^621444126 is an apocalyptic number.

621444126 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

621444126 is a wasteful number, since it uses less digits than its factorization.

621444126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103574026.

The product of its digits is 9216, while the sum is 30.

The square root of 621444126 is about 24928.7810773010. The cubic root of 621444126 is about 853.3634328101.

The spelling of 621444126 in words is "six hundred twenty-one million, four hundred forty-four thousand, one hundred twenty-six".