630128 has 10 divisors (see below), whose sum is σ = 1220904. Its totient is φ = 315056.

The previous prime is 630127. The next prime is 630151. The reversal of 630128 is 821036.

630128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×630128² = 794122592768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19676 + ... + 19707.

2⁶³⁰¹²⁸ is an apocalyptic number.

It is an amenable number.

630128 is a deficient number, since it is larger than the sum of its proper divisors (590776).

630128 is a wasteful number, since it uses less digits than its factorization.

630128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39391 (or 39385 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 630128 is about 793.8060216451. The cubic root of 630128 is about 85.7319942248.

The spelling of 630128 in words is "six hundred thirty thousand, one hundred twenty-eight".