11388481 has 8 divisors (see below), whose sum is σ = 12496680. Its totient is φ = 10313472.

The previous prime is 11388463. The next prime is 11388491. The reversal of 11388481 is 18488311.

It can be written as a sum of positive squares in 4 ways, for example, as 3094081 + 8294400 = 1759^2 + 2880^2 .

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

It is not a de Polignac number, because 11388481 - 2⁵ = 11388449 is a prime.

It is a super-2 number, since 2×11388481² = 259394998974722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11388431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7576 + ... + 8953.

It is an arithmetic number, because the mean of its divisors is an integer number (1562085).

Almost surely, 2^11388481 is an apocalyptic number.

It is an amenable number.

11388481 is a deficient number, since it is larger than the sum of its proper divisors (1108199).

11388481 is a wasteful number, since it uses less digits than its factorization.

11388481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16595.

The product of its digits is 6144, while the sum is 34.

The square root of 11388481 is about 3374.6823554225. The cubic root of 11388481 is about 224.9858822418.

The spelling of 11388481 in words is "eleven million, three hundred eighty-eight thousand, four hundred eighty-one".