128490 has 16 divisors (see below), whose sum is σ = 308448. Its totient is φ = 34256.

The previous prime is 128489. The next prime is 128509. The reversal of 128490 is 94821.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128490.

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, 2112 + ... + 2171.

It is an arithmetic number, because the mean of its divisors is an integer number (19278).

2¹²⁸⁴⁹⁰ is an apocalyptic number.

128490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128490 is an abundant number, since it is smaller than the sum of its proper divisors (179958).

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

128490 is a wasteful number, since it uses less digits than its factorization.

128490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4293.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 128490 is about 358.4550180985. The cubic root of 128490 is about 50.4610685798.

The spelling of 128490 in words is "one hundred twenty-eight thousand, four hundred ninety".