28838844 has 18 divisors (see below), whose sum is σ = 72898280. Its totient is φ = 9612936.

The previous prime is 28838819. The next prime is 28838861. The reversal of 28838844 is 44883882.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 28838844.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 400504 + ... + 400575.

Almost surely, 2^28838844 is an apocalyptic number.

It is an amenable number.

28838844 is an abundant number, since it is smaller than the sum of its proper divisors (44059436).

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

28838844 is a wasteful number, since it uses less digits than its factorization.

28838844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801089 (or 801084 counting only the distinct ones).

The product of its digits is 393216, while the sum is 45.

The square root of 28838844 is about 5370.1810025361. The cubic root of 28838844 is about 306.6615190272.

The spelling of 28838844 in words is "twenty-eight million, eight hundred thirty-eight thousand, eight hundred forty-four".