11638784 has 24 divisors (see below), whose sum is σ = 23275980. Its totient is φ = 5818368.

The previous prime is 11638777. The next prime is 11638789. The reversal of 11638784 is 48783611.

It is a super-2 number, since 2×11638784² = 270922585997312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11638789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 794 + ... + 4889.

Almost surely, 2^11638784 is an apocalyptic number.

It is an amenable number.

11638784 is a deficient number, since it is larger than the sum of its proper divisors (11637196).

11638784 is an frugal number, since it uses more digits than its factorization.

11638784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5705 (or 5685 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 11638784 is about 3411.5662092359. The cubic root of 11638784 is about 226.6222442742.

It can be divided in two parts, 116 and 38784, that multiplied together give a palindrome (4498944).

The spelling of 11638784 in words is "eleven million, six hundred thirty-eight thousand, seven hundred eighty-four".