11489681 has 12 divisors (see below), whose sum is σ = 13349952. Its totient is φ = 9686664.

The previous prime is 11489677. The next prime is 11489693. The reversal of 11489681 is 18698411.

11489681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11489681 - 2² = 11489677 is a prime.

It is a super-2 number, since 2×11489681² = 264025538963522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11489641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43556 + ... + 43818.

It is an arithmetic number, because the mean of its divisors is an integer number (1112496).

Almost surely, 2^11489681 is an apocalyptic number.

It is an amenable number.

11489681 is a deficient number, since it is larger than the sum of its proper divisors (1860271).

11489681 is an frugal number, since it uses more digits than its factorization.

11489681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 349 counting only the distinct ones).

The product of its digits is 13824, while the sum is 38.

The square root of 11489681 is about 3389.6431965621. The cubic root of 11489681 is about 225.6503390280.

The spelling of 11489681 in words is "eleven million, four hundred eighty-nine thousand, six hundred eighty-one".