11328581 has 8 divisors (see below), whose sum is σ = 12896064. Its totient is φ = 9850720.

The previous prime is 11328571. The next prime is 11328593. The reversal of 11328581 is 18582311.

11328581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11328581 - 2⁶ = 11328517 is a prime.

It is a super-2 number, since 2×11328581² = 256673494947122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11328571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22136 + ... + 22641.

It is an arithmetic number, because the mean of its divisors is an integer number (1612008).

Almost surely, 2^11328581 is an apocalyptic number.

11328581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11328581 is a deficient number, since it is larger than the sum of its proper divisors (1567483).

11328581 is a wasteful number, since it uses less digits than its factorization.

11328581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44811.

The product of its digits is 1920, while the sum is 29.

The square root of 11328581 is about 3365.7957454367. The cubic root of 11328581 is about 224.5907358550.

The spelling of 11328581 in words is "eleven million, three hundred twenty-eight thousand, five hundred eighty-one".