190889986 has 48 divisors (see below), whose sum is σ = 345080736. Its totient is φ = 78914304.

The previous prime is 190889981. The next prime is 190889987. The reversal of 190889986 is 689988091.

Together with 154190750 it forms an amicable pair .

It is a self number, because there is not a number n which added to its sum of digits gives 190889986.

It is not an unprimeable number, because it can be changed into a prime (190889981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 408525 + ... + 408991.

It is an arithmetic number, because the mean of its divisors is an integer number (7189182).

Almost surely, 2^190889986 is an apocalyptic number.

190889986 is a deficient number, since it is larger than the sum of its proper divisors (154190750).

190889986 is a wasteful number, since it uses less digits than its factorization.

190889986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 58.

The square root of 190889986 is about 13816.2942209552. The cubic root of 190889986 is about 575.7859306912.

The spelling of 190889986 in words is "one hundred ninety million, eight hundred eighty-nine thousand, nine hundred eighty-six".