11180985 has 32 divisors (see below), whose sum is σ = 19128960. Its totient is φ = 5557248.

The previous prime is 11180977. The next prime is 11180999. The reversal of 11180985 is 58908111.

It is not a de Polignac number, because 11180985 - 2³ = 11180977 is a prime.

It is a Curzon number.

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, 41431 + ... + 41699.

It is an arithmetic number, because the mean of its divisors is an integer number (597780).

Almost surely, 2^11180985 is an apocalyptic number.

11180985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11180985 is a deficient number, since it is larger than the sum of its proper divisors (7947975).

11180985 is a wasteful number, since it uses less digits than its factorization.

11180985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457.

The product of its (nonzero) digits is 2880, while the sum is 33.

The square root of 11180985 is about 3343.7979903098. The cubic root of 11180985 is about 223.6110984173.

The spelling of 11180985 in words is "eleven million, one hundred eighty thousand, nine hundred eighty-five".