189015900 has 72 divisors (see below), whose sum is σ = 553547904. Its totient is φ = 49790400.

The previous prime is 189015889. The next prime is 189015929. The reversal of 189015900 is 9510981.

It is a congruent number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 21105 + ... + 28695.

Almost surely, 2^189015900 is an apocalyptic number.

189015900 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 189015900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276773952).

189015900 is an abundant number, since it is smaller than the sum of its proper divisors (364532004).

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

189015900 is a wasteful number, since it uses less digits than its factorization.

189015900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7691 (or 7684 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 189015900 is about 13748.3053501150. The cubic root of 189015900 is about 573.8954472936.

The spelling of 189015900 in words is "one hundred eighty-nine million, fifteen thousand, nine hundred".