128630 has 16 divisors (see below), whose sum is σ = 244080. Its totient is φ = 48672.

The previous prime is 128629. The next prime is 128657. The reversal of 128630 is 36821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149 + ... + 528.

It is an arithmetic number, because the mean of its divisors is an integer number (15255).

2¹²⁸⁶³⁰ is an apocalyptic number.

128630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128630 is a deficient number, since it is larger than the sum of its proper divisors (115450).

128630 is a wasteful number, since it uses less digits than its factorization.

128630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703.

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

The square root of 128630 is about 358.6502474557. The cubic root of 128630 is about 50.4793890337.

Subtracting from 128630 its reverse (36821), we obtain a square (91809 = 303²).

The spelling of 128630 in words is "one hundred twenty-eight thousand, six hundred thirty".