11658985 has 8 divisors (see below), whose sum is σ = 15067080. Its totient is φ = 8609664.

The previous prime is 11658979. The next prime is 11659003. The reversal of 11658985 is 58985611.

It can be written as a sum of positive squares in 4 ways, for example, as 44521 + 11614464 = 211^2 + 3408^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11658985 - 2¹⁵ = 11626217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89620 + ... + 89749.

It is an arithmetic number, because the mean of its divisors is an integer number (1883385).

Almost surely, 2^11658985 is an apocalyptic number.

It is an amenable number.

11658985 is a deficient number, since it is larger than the sum of its proper divisors (3408095).

11658985 is a wasteful number, since it uses less digits than its factorization.

11658985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179387.

The product of its digits is 86400, while the sum is 43.

The square root of 11658985 is about 3414.5255893023. The cubic root of 11658985 is about 226.7532817288.

The spelling of 11658985 in words is "eleven million, six hundred fifty-eight thousand, nine hundred eighty-five".