28732836 has 48 divisors (see below), whose sum is σ = 73846080. Its totient is φ = 8622720.

The previous prime is 28732813. The next prime is 28732843. The reversal of 28732836 is 63823782.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28732794 and 28732803.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13390 + ... + 15386.

It is an arithmetic number, because the mean of its divisors is an integer number (1538460).

Almost surely, 2^28732836 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 28732836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36923040).

28732836 is an abundant number, since it is smaller than the sum of its proper divisors (45113244).

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

28732836 is a wasteful number, since it uses less digits than its factorization.

28732836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124 (or 2122 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 28732836 is about 5360.3018571719. The cubic root of 28732836 is about 306.2853078270.

The spelling of 28732836 in words is "twenty-eight million, seven hundred thirty-two thousand, eight hundred thirty-six".