630409628 has 6 divisors (see below), whose sum is σ = 1103216856. Its totient is φ = 315204812.

The previous prime is 630409621. The next prime is 630409643. The reversal of 630409628 is 826904036.

It is a junction number, because it is equal to n+sod(n) for n = 630409591 and 630409600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630409621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78801200 + ... + 78801207.

It is an arithmetic number, because the mean of its divisors is an integer number (183869476).

Almost surely, 2^630409628 is an apocalyptic number.

It is an amenable number.

630409628 is a deficient number, since it is larger than the sum of its proper divisors (472807228).

630409628 is a wasteful number, since it uses less digits than its factorization.

630409628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157602411 (or 157602409 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 630409628 is about 25107.9594551210. The cubic root of 630409628 is about 857.4476461108.

The spelling of 630409628 in words is "six hundred thirty million, four hundred nine thousand, six hundred twenty-eight".