188243889 has 8 divisors (see below), whose sum is σ = 252118272. Its totient is φ = 124932720.

The previous prime is 188243879. The next prime is 188243893. The reversal of 188243889 is 988342881.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 188243889 - 2⁷ = 188243761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (188243879) 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, 140022 + ... + 141359.

It is an arithmetic number, because the mean of its divisors is an integer number (31514784).

Almost surely, 2^188243889 is an apocalyptic number.

It is an amenable number.

188243889 is a deficient number, since it is larger than the sum of its proper divisors (63874383).

188243889 is a wasteful number, since it uses less digits than its factorization.

188243889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281607.

The product of its digits is 884736, while the sum is 51.

The square root of 188243889 is about 13720.2000349849. The cubic root of 188243889 is about 573.1130472080.

The spelling of 188243889 in words is "one hundred eighty-eight million, two hundred forty-three thousand, eight hundred eighty-nine".