189801870 has 16 divisors (see below), whose sum is σ = 455524560. Its totient is φ = 50613824.

The previous prime is 189801869. The next prime is 189801877. The reversal of 189801870 is 78108981.

189801870 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189801877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3163335 + ... + 3163394.

It is an arithmetic number, because the mean of its divisors is an integer number (28470285).

Almost surely, 2^189801870 is an apocalyptic number.

189801870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189801870 is an abundant number, since it is smaller than the sum of its proper divisors (265722690).

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

189801870 is a wasteful number, since it uses less digits than its factorization.

189801870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6326739.

The product of its (nonzero) digits is 32256, while the sum is 42.

The square root of 189801870 is about 13776.8599470271. The cubic root of 189801870 is about 574.6898087488.

The spelling of 189801870 in words is "one hundred eighty-nine million, eight hundred one thousand, eight hundred seventy".