10439840 has 48 divisors (see below), whose sum is σ = 25038720. Its totient is φ = 4112640.

The previous prime is 10439837. The next prime is 10439857. The reversal of 10439840 is 4893401.

10439840 = 131² + 132² + ... + 322².

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10901 + ... + 11819.

It is an arithmetic number, because the mean of its divisors is an integer number (521640).

Almost surely, 2^10439840 is an apocalyptic number.

10439840 is a gapful number since it is divisible by the number (10) 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 10439840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12519360).

10439840 is an abundant number, since it is smaller than the sum of its proper divisors (14598880).

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

10439840 is an equidigital number, since it uses as much as digits as its factorization.

10439840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 10439840 is about 3231.0741248074. The cubic root of 10439840 is about 218.5569464091.

The spelling of 10439840 in words is "ten million, four hundred thirty-nine thousand, eight hundred forty".