189993288 has 32 divisors (see below), whose sum is σ = 475320960. Its totient is φ = 63286080.

The previous prime is 189993283. The next prime is 189993299. The reversal of 189993288 is 882399981.

It is not an unprimeable number, because it can be changed into a prime (189993283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64978 + ... + 67838.

It is an arithmetic number, because the mean of its divisors is an integer number (14853780).

Almost surely, 2^189993288 is an apocalyptic number.

It is an amenable number.

189993288 is an abundant number, since it is smaller than the sum of its proper divisors (285327672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189993288 is a wasteful number, since it uses less digits than its factorization.

189993288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5637 (or 5633 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 57.

The square root of 189993288 is about 13783.8052801104. The cubic root of 189993288 is about 574.8829382363.

The spelling of 189993288 in words is "one hundred eighty-nine million, nine hundred ninety-three thousand, two hundred eighty-eight".