189409912 has 16 divisors (see below), whose sum is σ = 357324840. Its totient is φ = 94123296.

The previous prime is 189409877. The next prime is 189409931. The reversal of 189409912 is 219904981.

It is a happy number.

It is a super-2 number, since 2×189409912² = 71752229527695488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71323 + ... + 73930.

Almost surely, 2^189409912 is an apocalyptic number.

It is an amenable number.

189409912 is a deficient number, since it is larger than the sum of its proper divisors (167914928).

189409912 is a wasteful number, since it uses less digits than its factorization.

189409912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145422 (or 145418 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 189409912 is about 13762.6273654415. The cubic root of 189409912 is about 574.2939406733.

The spelling of 189409912 in words is "one hundred eighty-nine million, four hundred nine thousand, nine hundred twelve".