188402 has 4 divisors (see below), whose sum is σ = 282606. Its totient is φ = 94200.

The previous prime is 188401. The next prime is 188407. The reversal of 188402 is 204881.

188402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204881 = 211 ⋅971.

It can be written as a sum of positive squares in only one way, i.e., 130321 + 58081 = 361^2 + 241^2 .

It is not an unprimeable number, because it can be changed into a prime (188401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47099 + ... + 47102.

2¹⁸⁸⁴⁰² is an apocalyptic number.

188402 is a deficient number, since it is larger than the sum of its proper divisors (94204).

188402 is an equidigital number, since it uses as much as digits as its factorization.

188402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94203.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 188402 is about 434.0529921565. The cubic root of 188402 is about 57.3273459885.

The spelling of 188402 in words is "one hundred eighty-eight thousand, four hundred two".