11447440 has 20 divisors (see below), whose sum is σ = 26615484. Its totient is φ = 4578944.

The previous prime is 11447407. The next prime is 11447453. The reversal of 11447440 is 4474411.

It can be written as a sum of positive squares in 2 ways, for example, as 2108304 + 9339136 = 1452^2 + 3056^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 71467 + ... + 71626.

Almost surely, 2^11447440 is an apocalyptic number.

11447440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11447440 is an abundant number, since it is smaller than the sum of its proper divisors (15168044).

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

11447440 is a wasteful number, since it uses less digits than its factorization.

11447440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143106 (or 143100 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 11447440 is about 3383.4065673519. The cubic root of 11447440 is about 225.3734702807.

It can be divided in two parts, 1 and 1447440, that added together give a palindrome (1447441).

The spelling of 11447440 in words is "eleven million, four hundred forty-seven thousand, four hundred forty".