11985690 has 16 divisors (see below), whose sum is σ = 28765728. Its totient is φ = 3196176.

The previous prime is 11985689. The next prime is 11985703. The reversal of 11985690 is 9658911.

It is a super-2 number, since 2×11985690² = 287313529552200, which contains 22 as substring.

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, 199732 + ... + 199791.

It is an arithmetic number, because the mean of its divisors is an integer number (1797858).

Almost surely, 2^11985690 is an apocalyptic number.

11985690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11985690 is an abundant number, since it is smaller than the sum of its proper divisors (16780038).

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

11985690 is a wasteful number, since it uses less digits than its factorization.

11985690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399533.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 11985690 is about 3462.0355284139. The cubic root of 11985690 is about 228.8518075300.

The spelling of 11985690 in words is "eleven million, nine hundred eighty-five thousand, six hundred ninety".