11689890 has 16 divisors (see below), whose sum is σ = 28055808. Its totient is φ = 3117296.

The previous prime is 11689889. The next prime is 11689901. The reversal of 11689890 is 9898611.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194802 + ... + 194861.

It is an arithmetic number, because the mean of its divisors is an integer number (1753488).

Almost surely, 2^11689890 is an apocalyptic number.

11689890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11689890 is an abundant number, since it is smaller than the sum of its proper divisors (16365918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11689890 is a wasteful number, since it uses less digits than its factorization.

11689890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389673.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 11689890 is about 3419.0481131449. The cubic root of 11689890 is about 226.9534600262.

The spelling of 11689890 in words is "eleven million, six hundred eighty-nine thousand, eight hundred ninety".