621146860 has 24 divisors (see below), whose sum is σ = 1373062320. Its totient is φ = 235381824.

The previous prime is 621146821. The next prime is 621146863. The reversal of 621146860 is 68641126.

621146860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (621146863) 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, 816919 + ... + 817678.

It is an arithmetic number, because the mean of its divisors is an integer number (57210930).

Almost surely, 2^621146860 is an apocalyptic number.

It is an amenable number.

621146860 is an abundant number, since it is smaller than the sum of its proper divisors (751915460).

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

621146860 is a wasteful number, since it uses less digits than its factorization.

621146860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634625 (or 1634623 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 621146860 is about 24922.8180589595. The cubic root of 621146860 is about 853.2273431319.

Adding to 621146860 its reverse (68641126), we get a palindrome (689787986).

The spelling of 621146860 in words is "six hundred twenty-one million, one hundred forty-six thousand, eight hundred sixty".