189844965 has 96 divisors (see below), whose sum is σ = 362509056. Its totient is φ = 95178240.

The previous prime is 189844943. The next prime is 189844981. The reversal of 189844965 is 569448981.

It is not a de Polignac number, because 189844965 - 2⁹ = 189844453 is a prime.

It is a super-2 number, since 2×189844965² = 72082221471702450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1843104 + ... + 1843206.

It is an arithmetic number, because the mean of its divisors is an integer number (3776136).

Almost surely, 2^189844965 is an apocalyptic number.

189844965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189844965 is a deficient number, since it is larger than the sum of its proper divisors (172664091).

189844965 is a wasteful number, since it uses less digits than its factorization.

189844965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 189 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 189844965 is about 13778.4238939002. The cubic root of 189844965 is about 574.7333003876.

The spelling of 189844965 in words is "one hundred eighty-nine million, eight hundred forty-four thousand, nine hundred sixty-five".