28212528 has 40 divisors (see below), whose sum is σ = 73073200. Its totient is φ = 9379584.

The previous prime is 28212523. The next prime is 28212557. The reversal of 28212528 is 82521282.

It is a junction number, because it is equal to n+sod(n) for n = 28212495 and 28212504.

It is not an unprimeable number, because it can be changed into a prime (28212521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33618 + ... + 34446.

It is an arithmetic number, because the mean of its divisors is an integer number (1826830).

Almost surely, 2^28212528 is an apocalyptic number.

It is an amenable number.

28212528 is an abundant number, since it is smaller than the sum of its proper divisors (44860672).

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

28212528 is a wasteful number, since it uses less digits than its factorization.

28212528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549 (or 1543 counting only the distinct ones).

The product of its digits is 5120, while the sum is 30.

The square root of 28212528 is about 5311.5466674030. The cubic root of 28212528 is about 304.4252474363.

The spelling of 28212528 in words is "twenty-eight million, two hundred twelve thousand, five hundred twenty-eight".