11638481 has 4 divisors (see below), whose sum is σ = 11702964. Its totient is φ = 11574000.

The previous prime is 11638439. The next prime is 11638493. The reversal of 11638481 is 18483611.

It is a happy number.

11638481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18483611 = 743 ⋅24877.

It can be written as a sum of positive squares in 2 ways, for example, as 1500625 + 10137856 = 1225^2 + 3184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11638481 is a prime.

It is a super-2 number, since 2×11638481² = 270908479974722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11638411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31970 + ... + 32331.

It is an arithmetic number, because the mean of its divisors is an integer number (2925741).

Almost surely, 2^11638481 is an apocalyptic number.

It is an amenable number.

11638481 is a deficient number, since it is larger than the sum of its proper divisors (64483).

11638481 is an equidigital number, since it uses as much as digits as its factorization.

11638481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64482.

The product of its digits is 4608, while the sum is 32.

The square root of 11638481 is about 3411.5218011908. The cubic root of 11638481 is about 226.6202776560.

The spelling of 11638481 in words is "eleven million, six hundred thirty-eight thousand, four hundred eighty-one".