11681396 has 6 divisors (see below), whose sum is σ = 20442450. Its totient is φ = 5840696.

The previous prime is 11681353. The next prime is 11681399. The reversal of 11681396 is 69318611.

It can be written as a sum of positive squares in only one way, i.e., 10797796 + 883600 = 3286^2 + 940^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11681399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460171 + ... + 1460178.

It is an arithmetic number, because the mean of its divisors is an integer number (3407075).

Almost surely, 2^11681396 is an apocalyptic number.

It is an amenable number.

11681396 is a deficient number, since it is larger than the sum of its proper divisors (8761054).

11681396 is a wasteful number, since it uses less digits than its factorization.

11681396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2920353 (or 2920351 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 11681396 is about 3417.8057288266. The cubic root of 11681396 is about 226.8984777642.

Subtracting from 11681396 its sum of digits (35), we obtain a triangular number (11681361 = T₄₈₃₃).

The spelling of 11681396 in words is "eleven million, six hundred eighty-one thousand, three hundred ninety-six".