28539798 has 16 divisors (see below), whose sum is σ = 65233920. Its totient is φ = 8154216.

The previous prime is 28539781. The next prime is 28539853. The reversal of 28539798 is 89793582.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28539798.

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, 339718 + ... + 339801.

It is an arithmetic number, because the mean of its divisors is an integer number (4077120).

Almost surely, 2^28539798 is an apocalyptic number.

28539798 is an abundant number, since it is smaller than the sum of its proper divisors (36694122).

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

28539798 is a wasteful number, since it uses less digits than its factorization.

28539798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679531.

The product of its digits is 1088640, while the sum is 51.

The square root of 28539798 is about 5342.2652498729. The cubic root of 28539798 is about 305.5978526913.

The spelling of 28539798 in words is "twenty-eight million, five hundred thirty-nine thousand, seven hundred ninety-eight".