10439881 has 4 divisors (see below), whose sum is σ = 10485700. Its totient is φ = 10394064.

The previous prime is 10439857. The next prime is 10439917. The reversal of 10439881 is 18893401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18893401 = 1601 ⋅11801.

It can be written as a sum of positive squares in 2 ways, for example, as 6375625 + 4064256 = 2525^2 + 2016^2 .

It is a cyclic number.

It is not a de Polignac number, because 10439881 - 2⁹ = 10439369 is a prime.

It is a super-2 number, since 2×10439881² = 217982230588322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10439831) 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 3 ways as a sum of consecutive naturals, for example, 22566 + ... + 23023.

It is an arithmetic number, because the mean of its divisors is an integer number (2621425).

Almost surely, 2^10439881 is an apocalyptic number.

It is an amenable number.

10439881 is a deficient number, since it is larger than the sum of its proper divisors (45819).

10439881 is an equidigital number, since it uses as much as digits as its factorization.

10439881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45818.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 10439881 is about 3231.0804694405. The cubic root of 10439881 is about 218.5572325189.

The spelling of 10439881 in words is "ten million, four hundred thirty-nine thousand, eight hundred eighty-one".