28236828 has 12 divisors (see below), whose sum is σ = 65885960. Its totient is φ = 9412272.

The previous prime is 28236827. The next prime is 28236833. The reversal of 28236828 is 82863282.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28236821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1176523 + ... + 1176546.

Almost surely, 2^28236828 is an apocalyptic number.

It is an amenable number.

28236828 is an abundant number, since it is smaller than the sum of its proper divisors (37649132).

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

28236828 is a wasteful number, since it uses less digits than its factorization.

28236828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353076 (or 2353074 counting only the distinct ones).

The product of its digits is 73728, while the sum is 39.

The square root of 28236828 is about 5313.8336443664. The cubic root of 28236828 is about 304.5126248200.

The spelling of 28236828 in words is "twenty-eight million, two hundred thirty-six thousand, eight hundred twenty-eight".