189066855 has 16 divisors (see below), whose sum is σ = 310683744. Its totient is φ = 98110080.

The previous prime is 189066851. The next prime is 189066881. The reversal of 189066855 is 558660981.

It is not a de Polignac number, because 189066855 - 2² = 189066851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189066851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169776 + ... + 170885.

It is an arithmetic number, because the mean of its divisors is an integer number (19417734).

Almost surely, 2^189066855 is an apocalyptic number.

189066855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

189066855 is a deficient number, since it is larger than the sum of its proper divisors (121616889).

189066855 is a wasteful number, since it uses less digits than its factorization.

189066855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340706.

The product of its (nonzero) digits is 518400, while the sum is 48.

The square root of 189066855 is about 13750.1583627244. The cubic root of 189066855 is about 573.9470129999.

The spelling of 189066855 in words is "one hundred eighty-nine million, sixty-six thousand, eight hundred fifty-five".