189400 has 24 divisors (see below), whose sum is σ = 440820. Its totient is φ = 75680.

The previous prime is 189391. The next prime is 189401. The reversal of 189400 is 4981.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 274 + ... + 673.

2¹⁸⁹⁴⁰⁰ is an apocalyptic number.

189400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189400 is an abundant number, since it is smaller than the sum of its proper divisors (251420).

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

189400 is a wasteful number, since it uses less digits than its factorization.

189400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 189400 is about 435.2011029398. The cubic root of 189400 is about 57.4283922717.

It can be divided in two parts, 1 and 89400, that added together give a square (89401 = 299²).

The spelling of 189400 in words is "one hundred eighty-nine thousand, four hundred".