128600 has 24 divisors (see below), whose sum is σ = 299460. Its totient is φ = 51360.

The previous prime is 128599. The next prime is 128603. The reversal of 128600 is 6821.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122 + ... + 521.

2¹²⁸⁶⁰⁰ is an apocalyptic number.

128600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128600 is an abundant number, since it is smaller than the sum of its proper divisors (170860).

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

128600 is a wasteful number, since it uses less digits than its factorization.

128600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 128600 is about 358.6084215408. The cubic root of 128600 is about 50.4754643417.

The spelling of 128600 in words is "one hundred twenty-eight thousand, six hundred".