189135910 has 16 divisors (see below), whose sum is σ = 342896400. Its totient is φ = 75109536.

The previous prime is 189135901. The next prime is 189135917. The reversal of 189135910 is 19531981.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 189135910.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189135917) 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, 66645 + ... + 69424.

It is an arithmetic number, because the mean of its divisors is an integer number (21431025).

Almost surely, 2^189135910 is an apocalyptic number.

189135910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189135910 is a deficient number, since it is larger than the sum of its proper divisors (153760490).

189135910 is a wasteful number, since it uses less digits than its factorization.

189135910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136215.

The product of its (nonzero) digits is 9720, while the sum is 37.

The square root of 189135910 is about 13752.6691954689. The cubic root of 189135910 is about 574.0168808545.

The spelling of 189135910 in words is "one hundred eighty-nine million, one hundred thirty-five thousand, nine hundred ten".