11440040 has 16 divisors (see below), whose sum is σ = 25740180. Its totient is φ = 4576000.

The previous prime is 11440027. The next prime is 11440057. The reversal of 11440040 is 4004411.

It can be written as a sum of positive squares in 2 ways, for example, as 11437924 + 2116 = 3382^2 + 46^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11439997 and 11440024.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142961 + ... + 143040.

Almost surely, 2^11440040 is an apocalyptic number.

11440040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11440040 is an abundant number, since it is smaller than the sum of its proper divisors (14300140).

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

11440040 is a wasteful number, since it uses less digits than its factorization.

11440040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286012 (or 286008 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 11440040 is about 3382.3128181763. The cubic root of 11440040 is about 225.3248968827.

Adding to 11440040 its reverse (4004411), we get a palindrome (15444451).

The spelling of 11440040 in words is "eleven million, four hundred forty thousand, forty".