621112320 has 176 divisors, whose sum is σ = 2207812320. Its totient is φ = 165593088.

The previous prime is 621112313. The next prime is 621112333. The reversal of 621112320 is 23211126.

621112320 is a `hidden beast` number, since 621 + 1 + 1 + 23 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 621112293 and 621112302.

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, 135994 + ... + 140486.

Almost surely, 2^621112320 is an apocalyptic number.

621112320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621112320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1103906160).

621112320 is an abundant number, since it is smaller than the sum of its proper divisors (1586700000).

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

621112320 is a wasteful number, since it uses less digits than its factorization.

621112320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4527 (or 4503 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 621112320 is about 24922.1251100302. The cubic root of 621112320 is about 853.2115277531.

Adding to 621112320 its reverse (23211126), we get a palindrome (644323446).

The spelling of 621112320 in words is "six hundred twenty-one million, one hundred twelve thousand, three hundred twenty".