1138784 has 24 divisors (see below), whose sum is σ = 2361240. Its totient is φ = 539136.

The previous prime is 1138777. The next prime is 1138793. The reversal of 1138784 is 4878311.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1138784.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329 + ... + 1544.

It is an arithmetic number, because the mean of its divisors is an integer number (98385).

2^1138784 is an apocalyptic number.

It is an amenable number.

1138784 is an abundant number, since it is smaller than the sum of its proper divisors (1222456).

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

1138784 is a wasteful number, since it uses less digits than its factorization.

1138784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902 (or 1894 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 1138784 is about 1067.1382290969. The cubic root of 1138784 is about 104.4272365729.

It can be divided in two parts, 11 and 38784, that multiplied together give a palindrome (426624).

The spelling of 1138784 in words is "one million, one hundred thirty-eight thousand, seven hundred eighty-four".