189885619 has 16 divisors (see below), whose sum is σ = 240627456. Its totient is φ = 145533600.

The previous prime is 189885617. The next prime is 189885643. The reversal of 189885619 is 916588981.

It is a cyclic number.

It is not a de Polignac number, because 189885619 - 2¹ = 189885617 is a prime.

It is a super-2 number, since 2×189885619² = 72113096606026322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189885619.

It is not an unprimeable number, because it can be changed into a prime (189885613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15517 + ... + 24910.

It is an arithmetic number, because the mean of its divisors is an integer number (15039216).

Almost surely, 2^189885619 is an apocalyptic number.

189885619 is a deficient number, since it is larger than the sum of its proper divisors (50741837).

189885619 is a wasteful number, since it uses less digits than its factorization.

189885619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40506.

The product of its digits is 1244160, while the sum is 55.

The square root of 189885619 is about 13779.8990925188. The cubic root of 189885619 is about 574.7743225272.

The spelling of 189885619 in words is "one hundred eighty-nine million, eight hundred eighty-five thousand, six hundred nineteen".