189984998 has 16 divisors (see below), whose sum is σ = 332619264. Its totient is φ = 79689480.

The previous prime is 189984997. The next prime is 189985001. The reversal of 189984998 is 899489981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189984997) 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, 143708 + ... + 145023.

It is an arithmetic number, because the mean of its divisors is an integer number (20788704).

Almost surely, 2^189984998 is an apocalyptic number.

189984998 is a deficient number, since it is larger than the sum of its proper divisors (142634266).

189984998 is a wasteful number, since it uses less digits than its factorization.

189984998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288787.

The product of its digits is 13436928, while the sum is 65.

The square root of 189984998 is about 13783.5045616128. The cubic root of 189984998 is about 574.8745768026.

The spelling of 189984998 in words is "one hundred eighty-nine million, nine hundred eighty-four thousand, nine hundred ninety-eight".