11439990 has 48 divisors (see below), whose sum is σ = 30139200. Its totient is φ = 3010176.

The previous prime is 11439979. The next prime is 11440003. The reversal of 11439990 is 9993411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6306 + ... + 7914.

It is an arithmetic number, because the mean of its divisors is an integer number (627900).

Almost surely, 2^11439990 is an apocalyptic number.

11439990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11439990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15069600).

11439990 is an abundant number, since it is smaller than the sum of its proper divisors (18699210).

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

11439990 is a wasteful number, since it uses less digits than its factorization.

11439990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701 (or 1698 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 11439990 is about 3382.3054267762. The cubic root of 11439990 is about 225.3245686129.

It can be divided in two parts, 114 and 39990, that added together give a palindrome (40104).

The spelling of 11439990 in words is "eleven million, four hundred thirty-nine thousand, nine hundred ninety".