189788895 has 12 divisors (see below), whose sum is σ = 328967496. Its totient is φ = 101220720.

The previous prime is 189788861. The next prime is 189788897. The reversal of 189788895 is 598887981.

It is not a de Polignac number, because 189788895 - 2⁸ = 189788639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189788897) 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, 2108721 + ... + 2108810.

It is an arithmetic number, because the mean of its divisors is an integer number (27413958).

Almost surely, 2^189788895 is an apocalyptic number.

189788895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

189788895 is a deficient number, since it is larger than the sum of its proper divisors (139178601).

189788895 is a wasteful number, since it uses less digits than its factorization.

189788895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4217542 (or 4217539 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 63.

The square root of 189788895 is about 13776.3890406739. The cubic root of 189788895 is about 574.6767130398.

The spelling of 189788895 in words is "one hundred eighty-nine million, seven hundred eighty-eight thousand, eight hundred ninety-five".