621453344 has 24 divisors (see below), whose sum is σ = 1240723008. Its totient is φ = 306349120.

The previous prime is 621453337. The next prime is 621453367. The reversal of 621453344 is 443354126.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 621453344.

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, 134492 + ... + 139035.

It is an arithmetic number, because the mean of its divisors is an integer number (51696792).

Almost surely, 2^621453344 is an apocalyptic number.

It is an amenable number.

621453344 is a deficient number, since it is larger than the sum of its proper divisors (619269664).

621453344 is a wasteful number, since it uses less digits than its factorization.

621453344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273608 (or 273600 counting only the distinct ones).

The product of its digits is 34560, while the sum is 32.

The square root of 621453344 is about 24928.9659633126. The cubic root of 621453344 is about 853.3676521571.

The spelling of 621453344 in words is "six hundred twenty-one million, four hundred fifty-three thousand, three hundred forty-four".