621445426 has 32 divisors (see below), whose sum is σ = 1129656960. Its totient is φ = 250459776.

The previous prime is 621445411. The next prime is 621445439. The reversal of 621445426 is 624544126.

It is a junction number, because it is equal to n+sod(n) for n = 621445391 and 621445400.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27916 + ... + 44968.

It is an arithmetic number, because the mean of its divisors is an integer number (35301780).

Almost surely, 2^621445426 is an apocalyptic number.

621445426 is a deficient number, since it is larger than the sum of its proper divisors (508211534).

621445426 is a wasteful number, since it uses less digits than its factorization.

621445426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17218.

The product of its digits is 46080, while the sum is 34.

The square root of 621445426 is about 24928.8071515666. The cubic root of 621445426 is about 853.3640278605.

The spelling of 621445426 in words is "six hundred twenty-one million, four hundred forty-five thousand, four hundred twenty-six".