189321400 has 24 divisors (see below), whose sum is σ = 440172720. Its totient is φ = 75728480.

The previous prime is 189321343. The next prime is 189321427. The reversal of 189321400 is 4123981.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 473104 + ... + 473503.

It is an arithmetic number, because the mean of its divisors is an integer number (18340530).

Almost surely, 2^189321400 is an apocalyptic number.

189321400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189321400 is an abundant number, since it is smaller than the sum of its proper divisors (250851320).

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

189321400 is a wasteful number, since it uses less digits than its factorization.

189321400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946623 (or 946614 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 189321400 is about 13759.4113246171. The cubic root of 189321400 is about 574.2044701263.

It can be divided in two parts, 1 and 89321400, that added together give a square (89321401 = 9451²).

The spelling of 189321400 in words is "one hundred eighty-nine million, three hundred twenty-one thousand, four hundred".