630321628 has 6 divisors (see below), whose sum is σ = 1103062856. Its totient is φ = 315160812.

The previous prime is 630321623. The next prime is 630321661. The reversal of 630321628 is 826123036.

It is a self number, because there is not a number n which added to its sum of digits gives 630321628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630321623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78790200 + ... + 78790207.

Almost surely, 2^630321628 is an apocalyptic number.

It is an amenable number.

630321628 is a deficient number, since it is larger than the sum of its proper divisors (472741228).

630321628 is a wasteful number, since it uses less digits than its factorization.

630321628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157580411 (or 157580409 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 630321628 is about 25106.2069616260. The cubic root of 630321628 is about 857.4077467074.

The spelling of 630321628 in words is "six hundred thirty million, three hundred twenty-one thousand, six hundred twenty-eight".