189308055 has 16 divisors (see below), whose sum is σ = 316062720. Its totient is φ = 96574368.

The previous prime is 189308047. The next prime is 189308069. The reversal of 189308055 is 550803981.

189308055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189308055 - 2³ = 189308047 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 274015 + ... + 274704.

It is an arithmetic number, because the mean of its divisors is an integer number (19753920).

Almost surely, 2^189308055 is an apocalyptic number.

189308055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

189308055 is a deficient number, since it is larger than the sum of its proper divisors (126754665).

189308055 is a wasteful number, since it uses less digits than its factorization.

189308055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548750.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 189308055 is about 13758.9263752663. The cubic root of 189308055 is about 574.1909781867.

The spelling of 189308055 in words is "one hundred eighty-nine million, three hundred eight thousand, fifty-five".