621253424 has 40 divisors (see below), whose sum is σ = 1326142800. Its totient is φ = 279584000.

The previous prime is 621253403. The next prime is 621253427. The reversal of 621253424 is 424352126.

It is not an unprimeable number, because it can be changed into a prime (621253427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302 + ... + 35250.

It is an arithmetic number, because the mean of its divisors is an integer number (33153570).

Almost surely, 2^621253424 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 621253424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (663071400).

621253424 is an abundant number, since it is smaller than the sum of its proper divisors (704889376).

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

621253424 is a wasteful number, since it uses less digits than its factorization.

621253424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35069 (or 35063 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 621253424 is about 24924.9558475035. The cubic root of 621253424 is about 853.2761335900.

The spelling of 621253424 in words is "six hundred twenty-one million, two hundred fifty-three thousand, four hundred twenty-four".