10440009 has 14 divisors (see below), whose sum is σ = 15653946. Its totient is φ = 6959520.

The previous prime is 10439981. The next prime is 10440011. The reversal of 10440009 is 90004401.

It can be written as a sum of positive squares in only one way, i.e., 5774409 + 4665600 = 2403^2 + 2160^2 .

It is not a de Polignac number, because 10440009 - 2¹⁶ = 10374473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10439973 and 10440000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10440019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 6432 + ... + 7889.

It is an arithmetic number, because the mean of its divisors is an integer number (1118139).

Almost surely, 2^10440009 is an apocalyptic number.

It is an amenable number.

10440009 is a deficient number, since it is larger than the sum of its proper divisors (5213937).

10440009 is an frugal number, since it uses more digits than its factorization.

10440009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14339 (or 14324 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 10440009 is about 3231.1002769954. The cubic root of 10440009 is about 218.5581257351.

The spelling of 10440009 in words is "ten million, four hundred forty thousand, nine".