621942284 has 12 divisors (see below), whose sum is σ = 1114945608. Its totient is φ = 303386400.

The previous prime is 621942203. The next prime is 621942289. The reversal of 621942284 is 482249126.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (621942289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1896002 + ... + 1896329.

It is an arithmetic number, because the mean of its divisors is an integer number (92912134).

Almost surely, 2^621942284 is an apocalyptic number.

It is an amenable number.

621942284 is a deficient number, since it is larger than the sum of its proper divisors (493003324).

621942284 is a wasteful number, since it uses less digits than its factorization.

621942284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3792376 (or 3792374 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 621942284 is about 24938.7706994551. The cubic root of 621942284 is about 853.5913944575.

It can be divided in two parts, 621942 and 284, that added together give a palindrome (622226).

The spelling of 621942284 in words is "six hundred twenty-one million, nine hundred forty-two thousand, two hundred eighty-four".