7890189 has 8 divisors (see below), whose sum is σ = 10547040. Its totient is φ = 5246736.

The previous prime is 7890161. The next prime is 7890191. The reversal of 7890189 is 9810987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7890189 - 2⁷ = 7890061 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 7890189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7890119) 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 7 ways as a sum of consecutive naturals, for example, 1882 + ... + 4395.

It is an arithmetic number, because the mean of its divisors is an integer number (1318380).

Almost surely, 2^7890189 is an apocalyptic number.

It is an amenable number.

7890189 is a deficient number, since it is larger than the sum of its proper divisors (2656851).

7890189 is a wasteful number, since it uses less digits than its factorization.

7890189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6699.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 7890189 is about 2808.9480237270. The cubic root of 7890189 is about 199.0806891456.

The spelling of 7890189 in words is "seven million, eight hundred ninety thousand, one hundred eighty-nine".