11681858 has 8 divisors (see below), whose sum is σ = 17566860. Its totient is φ = 5826240.

The previous prime is 11681837. The next prime is 11681869. The reversal of 11681858 is 85818611.

It can be written as a sum of positive squares in 2 ways, for example, as 11444689 + 237169 = 3383^2 + 487^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6323 + ... + 7958.

Almost surely, 2^11681858 is an apocalyptic number.

11681858 is a deficient number, since it is larger than the sum of its proper divisors (5885002).

11681858 is a wasteful number, since it uses less digits than its factorization.

11681858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14692.

The product of its digits is 15360, while the sum is 38.

The square root of 11681858 is about 3417.8733153819. The cubic root of 11681858 is about 226.9014690082.

The spelling of 11681858 in words is "eleven million, six hundred eighty-one thousand, eight hundred fifty-eight".