11688945 has 32 divisors (see below), whose sum is σ = 20673792. Its totient is φ = 5609472.

The previous prime is 11688923. The next prime is 11688959. The reversal of 11688945 is 54988611.

It is not a de Polignac number, because 11688945 - 2⁵ = 11688913 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11688897 and 11688906.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4869 + ... + 6861.

It is an arithmetic number, because the mean of its divisors is an integer number (646056).

Almost surely, 2^11688945 is an apocalyptic number.

11688945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11688945 is a deficient number, since it is larger than the sum of its proper divisors (8984847).

11688945 is a wasteful number, since it uses less digits than its factorization.

11688945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041.

The product of its digits is 69120, while the sum is 42.

The square root of 11688945 is about 3418.9099139931. The cubic root of 11688945 is about 226.9473442915.

The spelling of 11688945 in words is "eleven million, six hundred eighty-eight thousand, nine hundred forty-five".