11406440 has 16 divisors (see below), whose sum is σ = 25664580. Its totient is φ = 4562560.

The previous prime is 11406433. The next prime is 11406443. The reversal of 11406440 is 4460411.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11142244 + 264196 = 3338^2 + 514^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (11406443) 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, 142541 + ... + 142620.

Almost surely, 2^11406440 is an apocalyptic number.

11406440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11406440 is an abundant number, since it is smaller than the sum of its proper divisors (14258140).

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

11406440 is a wasteful number, since it uses less digits than its factorization.

11406440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285172 (or 285168 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 11406440 is about 3377.3421502714. The cubic root of 11406440 is about 225.1040835315.

Adding to 11406440 its reverse (4460411), we get a palindrome (15866851).

The spelling of 11406440 in words is "eleven million, four hundred six thousand, four hundred forty".