11981682 has 20 divisors (see below), whose sum is σ = 26848206. Its totient is φ = 3993840.

The previous prime is 11981659. The next prime is 11981701. The reversal of 11981682 is 28618911.

It can be written as a sum of positive squares in only one way, i.e., 7733961 + 4247721 = 2781^2 + 2061^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 36819 + ... + 37142.

Almost surely, 2^11981682 is an apocalyptic number.

11981682 is an abundant number, since it is smaller than the sum of its proper divisors (14866524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11981682 is an equidigital number, since it uses as much as digits as its factorization.

11981682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73975 (or 73966 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 11981682 is about 3461.4566298020. The cubic root of 11981682 is about 228.8262954317.

The spelling of 11981682 in words is "eleven million, nine hundred eighty-one thousand, six hundred eighty-two".