1138823 has 8 divisors (see below), whose sum is σ = 1336992. Its totient is φ = 949536.

The previous prime is 1138793. The next prime is 1138829. The reversal of 1138823 is 3288311.

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

It is not a de Polignac number, because 1138823 - 2⁸ = 1138567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1138792 and 1138801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138829) 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, 1940 + ... + 2457.

It is an arithmetic number, because the mean of its divisors is an integer number (167124).

2^1138823 is an apocalyptic number.

1138823 is a deficient number, since it is larger than the sum of its proper divisors (198169).

1138823 is an equidigital number, since it uses as much as digits as its factorization.

1138823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4441.

The product of its digits is 1152, while the sum is 26.

The square root of 1138823 is about 1067.1565021120. The cubic root of 1138823 is about 104.4284286677.

It can be divided in two parts, 11388 and 23, that added together give a palindrome (11411).

The spelling of 1138823 in words is "one million, one hundred thirty-eight thousand, eight hundred twenty-three".