11400440 has 32 divisors (see below), whose sum is σ = 26347680. Its totient is φ = 4436352.

The previous prime is 11400439. The next prime is 11400443. The reversal of 11400440 is 4400411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11400443) 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, 2372 + ... + 5331.

It is an arithmetic number, because the mean of its divisors is an integer number (823365).

Almost surely, 2^11400440 is an apocalyptic number.

11400440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11400440 is an abundant number, since it is smaller than the sum of its proper divisors (14947240).

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

11400440 is a wasteful number, since it uses less digits than its factorization.

11400440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7751 (or 7747 counting only the distinct ones).

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

The square root of 11400440 is about 3376.4537609747. The cubic root of 11400440 is about 225.0646069613.

Adding to 11400440 its reverse (4400411), we get a palindrome (15800851).

The spelling of 11400440 in words is "eleven million, four hundred thousand, four hundred forty".