128402 has 16 divisors (see below), whose sum is σ = 211200. Its totient is φ = 58320.

The previous prime is 128399. The next prime is 128411. The reversal of 128402 is 204821.

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, 1124 + ... + 1232.

It is an arithmetic number, because the mean of its divisors is an integer number (13200).

2¹²⁸⁴⁰² is an apocalyptic number.

128402 is a deficient number, since it is larger than the sum of its proper divisors (82798).

128402 is a wasteful number, since it uses less digits than its factorization.

128402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 128402 is about 358.3322480604. The cubic root of 128402 is about 50.4495460536.

The spelling of 128402 in words is "one hundred twenty-eight thousand, four hundred two".