28831441 has 4 divisors (see below), whose sum is σ = 28844452. Its totient is φ = 28818432.

The previous prime is 28831433. The next prime is 28831469. The reversal of 28831441 is 14413882.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15171025 + 13660416 = 3895^2 + 3696^2 .

It is a cyclic number.

It is not a de Polignac number, because 28831441 - 2³ = 28831433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28831141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2256 + ... + 7921.

It is an arithmetic number, because the mean of its divisors is an integer number (7211113).

Almost surely, 2^28831441 is an apocalyptic number.

It is an amenable number.

28831441 is a deficient number, since it is larger than the sum of its proper divisors (13011).

28831441 is a wasteful number, since it uses less digits than its factorization.

28831441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13010.

The product of its digits is 6144, while the sum is 31.

The square root of 28831441 is about 5369.4916891639. The cubic root of 28831441 is about 306.6352765339.

It can be divided in two parts, 2883 and 1441, that multiplied together give a triangular number (4154403 = T₂₈₈₂).

The spelling of 28831441 in words is "twenty-eight million, eight hundred thirty-one thousand, four hundred forty-one".