11404240 has 20 divisors (see below), whose sum is σ = 26515044. Its totient is φ = 4561664.

The previous prime is 11404231. The next prime is 11404241. The reversal of 11404240 is 4240411.

It can be written as a sum of positive squares in 2 ways, for example, as 3519376 + 7884864 = 1876^2 + 2808^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11404241) 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, 71197 + ... + 71356.

Almost surely, 2^11404240 is an apocalyptic number.

11404240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11404240 is an abundant number, since it is smaller than the sum of its proper divisors (15110804).

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

11404240 is a wasteful number, since it uses less digits than its factorization.

11404240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142566 (or 142560 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 11404240 is about 3377.0164346654. The cubic root of 11404240 is about 225.0896103968.

Adding to 11404240 its reverse (4240411), we get a palindrome (15644651).

The spelling of 11404240 in words is "eleven million, four hundred four thousand, two hundred forty".