11504138 has 16 divisors (see below), whose sum is σ = 18506880. Its totient is φ = 5343936.

The previous prime is 11504137. The next prime is 11504147. The reversal of 11504138 is 83140511.

It is a super-2 number, since 2×11504138² = 264690382246088, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11504137) by changing a digit.

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, 545 + ... + 4827.

It is an arithmetic number, because the mean of its divisors is an integer number (1156680).

Almost surely, 2^11504138 is an apocalyptic number.

11504138 is a deficient number, since it is larger than the sum of its proper divisors (7002742).

11504138 is a wasteful number, since it uses less digits than its factorization.

11504138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4381.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 11504138 is about 3391.7750515033. The cubic root of 11504138 is about 225.7449415867.

Adding to 11504138 its reverse (83140511), we get a palindrome (94644649).

The spelling of 11504138 in words is "eleven million, five hundred four thousand, one hundred thirty-eight".