621630232 has 16 divisors (see below), whose sum is σ = 1167107760. Its totient is φ = 310401504.

The previous prime is 621630209. The next prime is 621630301. The reversal of 621630232 is 232036126.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 621630197 and 621630206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45268 + ... + 57379.

It is an arithmetic number, because the mean of its divisors is an integer number (72944235).

Almost surely, 2^621630232 is an apocalyptic number.

It is an amenable number.

621630232 is a deficient number, since it is larger than the sum of its proper divisors (545477528).

621630232 is a wasteful number, since it uses less digits than its factorization.

621630232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103410 (or 103406 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 621630232 is about 24932.5135515856. The cubic root of 621630232 is about 853.4486108641.

Adding to 621630232 its reverse (232036126), we get a palindrome (853666358).

The spelling of 621630232 in words is "six hundred twenty-one million, six hundred thirty thousand, two hundred thirty-two".