28020828 has 48 divisors (see below), whose sum is σ = 75527424. Its totient is φ = 7991040.

The previous prime is 28020827. The next prime is 28020847. The reversal of 28020828 is 82802082.

It is a junction number, because it is equal to n+sod(n) for n = 28020795 and 28020804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28020823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4000 + ... + 8487.

It is an arithmetic number, because the mean of its divisors is an integer number (1573488).

Almost surely, 2^28020828 is an apocalyptic number.

It is an amenable number.

28020828 is an abundant number, since it is smaller than the sum of its proper divisors (47506596).

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

28020828 is a wasteful number, since it uses less digits than its factorization.

28020828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12522 (or 12520 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 28020828 is about 5293.4703172871. The cubic root of 28020828 is about 303.7341714728.

The spelling of 28020828 in words is "twenty-eight million, twenty thousand, eight hundred twenty-eight".