630621652 has 12 divisors (see below), whose sum is σ = 1104605236. Its totient is φ = 315020160.

The previous prime is 630621643. The next prime is 630621683. The reversal of 630621652 is 256126036.

It can be written as a sum of positive squares in 2 ways, for example, as 541772176 + 88849476 = 23276^2 + 9426^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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, 67749 + ... + 76492.

Almost surely, 2^630621652 is an apocalyptic number.

It is an amenable number.

630621652 is a deficient number, since it is larger than the sum of its proper divisors (473983584).

630621652 is a wasteful number, since it uses less digits than its factorization.

630621652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145338 (or 145336 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 630621652 is about 25112.1813469081. The cubic root of 630621652 is about 857.5437630344.

Adding to 630621652 its reverse (256126036), we get a palindrome (886747688).

The spelling of 630621652 in words is "six hundred thirty million, six hundred twenty-one thousand, six hundred fifty-two".