189905344 has 14 divisors (see below), whose sum is σ = 376843544. Its totient is φ = 94952640.

The previous prime is 189905327. The next prime is 189905357. The reversal of 189905344 is 443509981.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 189905344.

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 as a sum of consecutive naturals, namely, 1483572 + ... + 1483699.

It is an arithmetic number, because the mean of its divisors is an integer number (26917396).

Almost surely, 2^189905344 is an apocalyptic number.

It is an amenable number.

189905344 is a deficient number, since it is larger than the sum of its proper divisors (186938200).

189905344 is an equidigital number, since it uses as much as digits as its factorization.

189905344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2967283 (or 2967273 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 189905344 is about 13780.6147903495. The cubic root of 189905344 is about 574.7942240360.

The spelling of 189905344 in words is "one hundred eighty-nine million, nine hundred five thousand, three hundred forty-four".