11619985 has 16 divisors (see below), whose sum is σ = 15304464. Its totient is φ = 8416512.

The previous prime is 11619977. The next prime is 11620003. The reversal of 11619985 is 58991611.

It can be written as a sum of positive squares in 8 ways, for example, as 410881 + 11209104 = 641^2 + 3348^2 .

It is not a de Polignac number, because 11619985 - 2³ = 11619977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1759 + ... + 5131.

It is an arithmetic number, because the mean of its divisors is an integer number (956529).

Almost surely, 2^11619985 is an apocalyptic number.

It is an amenable number.

11619985 is a deficient number, since it is larger than the sum of its proper divisors (3684479).

11619985 is a wasteful number, since it uses less digits than its factorization.

11619985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3444.

The product of its digits is 19440, while the sum is 40.

The square root of 11619985 is about 3408.8099096312. The cubic root of 11619985 is about 226.5001648724.

The spelling of 11619985 in words is "eleven million, six hundred nineteen thousand, nine hundred eighty-five".