28339441 has 12 divisors (see below), whose sum is σ = 31201500. Its totient is φ = 25721280.

The previous prime is 28339429. The next prime is 28339453. The reversal of 28339441 is 14493382.

It is an interprime number because it is at equal distance from previous prime (28339429) and next prime (28339453).

It can be written as a sum of positive squares in 6 ways, for example, as 17640000 + 10699441 = 4200^2 + 3271^2 .

It is not a de Polignac number, because 28339441 - 2⁷ = 28339313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28339397 and 28339406.

It is not an unprimeable number, because it can be changed into a prime (28339741) 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 11 ways as a sum of consecutive naturals, for example, 8935 + ... + 11683.

It is an arithmetic number, because the mean of its divisors is an integer number (2600125).

Almost surely, 2^28339441 is an apocalyptic number.

It is an amenable number.

28339441 is a deficient number, since it is larger than the sum of its proper divisors (2862059).

28339441 is a wasteful number, since it uses less digits than its factorization.

28339441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836 (or 2823 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 28339441 is about 5323.4801586932. The cubic root of 28339441 is about 304.8810465090.

The spelling of 28339441 in words is "twenty-eight million, three hundred thirty-nine thousand, four hundred forty-one".