11138487 has 8 divisors (see below), whose sum is σ = 14958720. Its totient is φ = 7371960.

The previous prime is 11138473. The next prime is 11138513. The reversal of 11138487 is 78483111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11138487 - 2⁴ = 11138471 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11138437) 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, 12939 + ... + 13772.

It is an arithmetic number, because the mean of its divisors is an integer number (1869840).

Almost surely, 2^11138487 is an apocalyptic number.

11138487 is a deficient number, since it is larger than the sum of its proper divisors (3820233).

11138487 is a wasteful number, since it uses less digits than its factorization.

11138487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26853.

The product of its digits is 5376, while the sum is 33.

The square root of 11138487 is about 3337.4371904202. The cubic root of 11138487 is about 223.3274296105.

Subtracting from 11138487 its product of digits (5376), we obtain a palindrome (11133111).

It can be divided in two parts, 1113 and 8487, that multiplied together give a triangular number (9446031 = T₄₃₄₆).

The spelling of 11138487 in words is "eleven million, one hundred thirty-eight thousand, four hundred eighty-seven".