128090 has 8 divisors (see below), whose sum is σ = 230580. Its totient is φ = 51232.

The previous prime is 128053. The next prime is 128099. The reversal of 128090 is 90821.

It can be written as a sum of positive squares in 2 ways, for example, as 124609 + 3481 = 353^2 + 59^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6395 + ... + 6414.

2¹²⁸⁰⁹⁰ is an apocalyptic number.

128090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128090 is a deficient number, since it is larger than the sum of its proper divisors (102490).

128090 is a wasteful number, since it uses less digits than its factorization.

128090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12816.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 128090 is about 357.8966331219. The cubic root of 128090 is about 50.4086509883.

The spelling of 128090 in words is "one hundred twenty-eight thousand, ninety".