1138984 has 48 divisors (see below), whose sum is σ = 2725920. Its totient is φ = 433440.

The previous prime is 1138979. The next prime is 1138987. The reversal of 1138984 is 4898311.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138987) 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 in 11 ways as a sum of consecutive naturals, for example, 26467 + ... + 26509.

It is an arithmetic number, because the mean of its divisors is an integer number (56790).

2^1138984 is an apocalyptic number.

1138984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1138984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1362960).

1138984 is an abundant number, since it is smaller than the sum of its proper divisors (1586936).

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

1138984 is a wasteful number, since it uses less digits than its factorization.

1138984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 63 counting only the distinct ones).

The product of its digits is 6912, while the sum is 34.

The square root of 1138984 is about 1067.2319335552. The cubic root of 1138984 is about 104.4333495919.

It can be divided in two parts, 11 and 38984, that multiplied together give a palindrome (428824).

The spelling of 1138984 in words is "one million, one hundred thirty-eight thousand, nine hundred eighty-four".