11445138 has 80 divisors (see below), whose sum is σ = 27599616. Its totient is φ = 3538080.

The previous prime is 11445103. The next prime is 11445139. The reversal of 11445138 is 83154411.

It is a happy number.

11445138 is a `hidden beast` number, since 1 + 144 + 513 + 8 = 666.

11445138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11445139) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 215920 + ... + 215972.

Almost surely, 2^11445138 is an apocalyptic number.

11445138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11445138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13799808).

11445138 is an abundant number, since it is smaller than the sum of its proper divisors (16154478).

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

11445138 is a wasteful number, since it uses less digits than its factorization.

11445138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 132 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 11445138 is about 3383.0663605670. The cubic root of 11445138 is about 225.3583622592.

Adding to 11445138 its reverse (83154411), we get a palindrome (94599549).

The spelling of 11445138 in words is "eleven million, four hundred forty-five thousand, one hundred thirty-eight".