128670 has 16 divisors (see below), whose sum is σ = 308880. Its totient is φ = 34304.

The previous prime is 128669. The next prime is 128677. The reversal of 128670 is 76821.

128670 = T₅₂ + T₅₃ + ... + T₉₆.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 128670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2115 + ... + 2174.

It is an arithmetic number, because the mean of its divisors is an integer number (19305).

2¹²⁸⁶⁷⁰ is an apocalyptic number.

128670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128670 is an abundant number, since it is smaller than the sum of its proper divisors (180210).

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

128670 is a wasteful number, since it uses less digits than its factorization.

128670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4299.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 128670 is about 358.7060077557. The cubic root of 128670 is about 50.4846210073.

The spelling of 128670 in words is "one hundred twenty-eight thousand, six hundred seventy".