189231898 has 16 divisors (see below), whose sum is σ = 289547136. Its totient is φ = 92732080.

The previous prime is 189231893. The next prime is 189231899. The reversal of 189231898 is 898132981.

It is a super-2 number, since 2×189231898² = 71617422441364808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189231893) 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, 20715 + ... + 28417.

It is an arithmetic number, because the mean of its divisors is an integer number (18096696).

Almost surely, 2^189231898 is an apocalyptic number.

189231898 is a deficient number, since it is larger than the sum of its proper divisors (100315238).

189231898 is a wasteful number, since it uses less digits than its factorization.

189231898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7949.

The product of its digits is 248832, while the sum is 49.

The square root of 189231898 is about 13756.1585480831. The cubic root of 189231898 is about 574.1139704976.

The spelling of 189231898 in words is "one hundred eighty-nine million, two hundred thirty-one thousand, eight hundred ninety-eight".