1139988 has 12 divisors (see below), whose sum is σ = 2660000. Its totient is φ = 379992.

The previous prime is 1139959. The next prime is 1139989. The reversal of 1139988 is 8899311.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47488 + ... + 47511.

2^1139988 is an apocalyptic number.

It is an amenable number.

1139988 is an abundant number, since it is smaller than the sum of its proper divisors (1520012).

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

1139988 is a wasteful number, since it uses less digits than its factorization.

1139988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95006 (or 95004 counting only the distinct ones).

The product of its digits is 15552, while the sum is 39.

The square root of 1139988 is about 1067.7022056735. The cubic root of 1139988 is about 104.4640261392.

It can be divided in two parts, 113 and 9988, that added together give a palindrome (10101).

The spelling of 1139988 in words is "one million, one hundred thirty-nine thousand, nine hundred eighty-eight".