10839990 has 64 divisors (see below), whose sum is σ = 30481920. Its totient is φ = 2415360.

The previous prime is 10839979. The next prime is 10839991. The reversal of 10839990 is 9993801.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10839991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7981 + ... + 9239.

It is an arithmetic number, because the mean of its divisors is an integer number (476280).

Almost surely, 2^10839990 is an apocalyptic number.

10839990 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 10839990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15240960).

10839990 is an abundant number, since it is smaller than the sum of its proper divisors (19641930).

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

10839990 is a wasteful number, since it uses less digits than its factorization.

10839990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 10839990 is about 3292.4140079887. The cubic root of 10839990 is about 221.3143768744.

The spelling of 10839990 in words is "ten million, eight hundred thirty-nine thousand, nine hundred ninety".