630353628 has 72 divisors (see below), whose sum is σ = 1701598080. Its totient is φ = 196318080.

The previous prime is 630353623. The next prime is 630353651. The reversal of 630353628 is 826353036.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 630353592 and 630353601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630353623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22626 + ... + 42102.

Almost surely, 2^630353628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 630353628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850799040).

630353628 is an abundant number, since it is smaller than the sum of its proper divisors (1071244452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

630353628 is a wasteful number, since it uses less digits than its factorization.

630353628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19547 (or 19542 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 630353628 is about 25106.8442461413. The cubic root of 630353628 is about 857.4222560110.

The spelling of 630353628 in words is "six hundred thirty million, three hundred fifty-three thousand, six hundred twenty-eight".