621011320 has 32 divisors (see below), whose sum is σ = 1398118320. Its totient is φ = 248254720.

The previous prime is 621011317. The next prime is 621011341. The reversal of 621011320 is 23110126.

It is a junction number, because it is equal to n+sod(n) for n = 621011294 and 621011303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82515 + ... + 89725.

Almost surely, 2^621011320 is an apocalyptic number.

It is an amenable number.

621011320 is an abundant number, since it is smaller than the sum of its proper divisors (777107000).

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

621011320 is a wasteful number, since it uses less digits than its factorization.

621011320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9375 (or 9371 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 621011320 is about 24920.0987156953. The cubic root of 621011320 is about 853.1652779134.

Adding to 621011320 its reverse (23110126), we get a palindrome (644121446).

The spelling of 621011320 in words is "six hundred twenty-one million, eleven thousand, three hundred twenty".