28165844 has 24 divisors (see below), whose sum is σ = 58275840. Its totient is φ = 11654496.

The previous prime is 28165799. The next prime is 28165861. The reversal of 28165844 is 44856182.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28165798 and 28165807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16532 + ... + 18155.

It is an arithmetic number, because the mean of its divisors is an integer number (2428160).

Almost surely, 2^28165844 is an apocalyptic number.

It is an amenable number.

28165844 is an abundant number, since it is smaller than the sum of its proper divisors (30109996).

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

28165844 is a wasteful number, since it uses less digits than its factorization.

28165844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34727 (or 34725 counting only the distinct ones).

The product of its digits is 61440, while the sum is 38.

The square root of 28165844 is about 5307.1502710965. The cubic root of 28165844 is about 304.2572412898.

The spelling of 28165844 in words is "twenty-eight million, one hundred sixty-five thousand, eight hundred forty-four".