621436416 has 120 divisors (see below), whose sum is σ = 1714736232. Its totient is φ = 199987200.

The previous prime is 621436391. The next prime is 621436427. The reversal of 621436416 is 614634126.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1475886 + ... + 1476306.

Almost surely, 2^621436416 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 621436416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857368116).

621436416 is an abundant number, since it is smaller than the sum of its proper divisors (1093299816).

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

621436416 is an equidigital number, since it uses as much as digits as its factorization.

621436416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 457 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 621436416 is about 24928.6264362881. The cubic root of 621436416 is about 853.3599036866.

The spelling of 621436416 in words is "six hundred twenty-one million, four hundred thirty-six thousand, four hundred sixteen".