189870000 has 100 divisors (see below), whose sum is σ = 613022520. Its totient is φ = 50624000.

The previous prime is 189869993. The next prime is 189870011. The reversal of 189870000 is 78981.

189870000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (100).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26836 + ... + 33164.

Almost surely, 2^189870000 is an apocalyptic number.

189870000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189870000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306511260).

189870000 is an abundant number, since it is smaller than the sum of its proper divisors (423152520).

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

189870000 is an equidigital number, since it uses as much as digits as its factorization.

189870000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360 (or 6339 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 189870000 is about 13779.3323495734. The cubic root of 189870000 is about 574.7585627831.

The spelling of 189870000 in words is "one hundred eighty-nine million, eight hundred seventy thousand".