28539344 has 40 divisors (see below), whose sum is σ = 57591552. Its totient is φ = 13685760.

The previous prime is 28539337. The next prime is 28539359. The reversal of 28539344 is 44393582.

It is a junction number, because it is equal to n+sod(n) for n = 28539298 and 28539307.

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, 80672 + ... + 81024.

Almost surely, 2^28539344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28539344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28795776).

28539344 is an abundant number, since it is smaller than the sum of its proper divisors (29052208).

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

28539344 is a wasteful number, since it uses less digits than its factorization.

28539344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555 (or 549 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 28539344 is about 5342.2227583657. Note that the first 3 decimals coincide. The cubic root of 28539344 is about 305.5962322388.

The spelling of 28539344 in words is "twenty-eight million, five hundred thirty-nine thousand, three hundred forty-four".