189896566 has 16 divisors (see below), whose sum is σ = 288993600. Its totient is φ = 93570048.

The previous prime is 189896561. The next prime is 189896569. The reversal of 189896566 is 665698981.

It is a self number, because there is not a number n which added to its sum of digits gives 189896566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189896561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134070 + ... + 135478.

It is an arithmetic number, because the mean of its divisors is an integer number (18062100).

Almost surely, 2^189896566 is an apocalyptic number.

189896566 is a deficient number, since it is larger than the sum of its proper divisors (99097034).

189896566 is a wasteful number, since it uses less digits than its factorization.

189896566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343.

The product of its digits is 5598720, while the sum is 58.

The square root of 189896566 is about 13780.2962957986. The cubic root of 189896566 is about 574.7853676564.

The spelling of 189896566 in words is "one hundred eighty-nine million, eight hundred ninety-six thousand, five hundred sixty-six".