11681892 has 18 divisors (see below), whose sum is σ = 29529318. Its totient is φ = 3893952.

The previous prime is 11681881. The next prime is 11681893. The reversal of 11681892 is 29818611.

It can be written as a sum of positive squares in only one way, i.e., 10653696 + 1028196 = 3264^2 + 1014^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 324497 = 11681892 / (1 + 1 + 6 + 8 + 1 + 8 + 9 + 2).

It is not an unprimeable number, because it can be changed into a prime (11681893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 162213 + ... + 162284.

Almost surely, 2^11681892 is an apocalyptic number.

11681892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11681892 is an abundant number, since it is smaller than the sum of its proper divisors (17847426).

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

11681892 is a wasteful number, since it uses less digits than its factorization.

11681892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324507 (or 324502 counting only the distinct ones).

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

The square root of 11681892 is about 3417.8782892315. The cubic root of 11681892 is about 226.9016891399.

The spelling of 11681892 in words is "eleven million, six hundred eighty-one thousand, eight hundred ninety-two".