189989288 has 16 divisors (see below), whose sum is σ = 356392500. Its totient is φ = 94951296.

The previous prime is 189989281. The next prime is 189989299. The reversal of 189989288 is 882989981.

It can be written as a sum of positive squares in 2 ways, for example, as 183927844 + 6061444 = 13562^2 + 2462^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 189989288.

It is not an unprimeable number, because it can be changed into a prime (189989281) 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 3 ways as a sum of consecutive naturals, for example, 20498 + ... + 28286.

Almost surely, 2^189989288 is an apocalyptic number.

It is an amenable number.

189989288 is a deficient number, since it is larger than the sum of its proper divisors (166403212).

189989288 is a wasteful number, since it uses less digits than its factorization.

189989288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10844 (or 10840 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 62.

The square root of 189989288 is about 13783.6601815338. The cubic root of 189989288 is about 574.8789037992.

The spelling of 189989288 in words is "one hundred eighty-nine million, nine hundred eighty-nine thousand, two hundred eighty-eight".