11445540 has 24 divisors (see below), whose sum is σ = 32047680. Its totient is φ = 3052128.

The previous prime is 11445529. The next prime is 11445557. The reversal of 11445540 is 4554411.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 11445540.

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 7 ways as a sum of consecutive naturals, for example, 95320 + ... + 95439.

It is an arithmetic number, because the mean of its divisors is an integer number (1335320).

Almost surely, 2^11445540 is an apocalyptic number.

11445540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11445540 is an abundant number, since it is smaller than the sum of its proper divisors (20602140).

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

11445540 is a wasteful number, since it uses less digits than its factorization.

11445540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190771 (or 190769 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 11445540 is about 3383.1257736005. The cubic root of 11445540 is about 225.3610007304.

Adding to 11445540 its reverse (4554411), we get a palindrome (15999951).

It can be divided in two parts, 114 and 45540, that added together give a palindrome (45654).

The spelling of 11445540 in words is "eleven million, four hundred forty-five thousand, five hundred forty".