189953900 has 36 divisors (see below), whose sum is σ = 415473408. Its totient is φ = 75378240.

The previous prime is 189953899. The next prime is 189953909. The reversal of 189953900 is 9359981.

It is not an unprimeable number, because it can be changed into a prime (189953909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5222 + ... + 20178.

It is an arithmetic number, because the mean of its divisors is an integer number (11540928).

Almost surely, 2^189953900 is an apocalyptic number.

189953900 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 189953900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207736704).

189953900 is an abundant number, since it is smaller than the sum of its proper divisors (225519508).

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

189953900 is a wasteful number, since it uses less digits than its factorization.

189953900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15098 (or 15091 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 189953900 is about 13782.3764278879. The cubic root of 189953900 is about 574.8432086677.

The spelling of 189953900 in words is "one hundred eighty-nine million, nine hundred fifty-three thousand, nine hundred".