28322028 has 48 divisors (see below), whose sum is σ = 83919360. Its totient is φ = 8091792.

The previous prime is 28322011. The next prime is 28322071. The reversal of 28322028 is 82022382.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 28321992 and 28322010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17976 + ... + 19487.

It is an arithmetic number, because the mean of its divisors is an integer number (1748320).

Almost surely, 2^28322028 is an apocalyptic number.

28322028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28322028 is an abundant number, since it is smaller than the sum of its proper divisors (55597332).

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

28322028 is a wasteful number, since it uses less digits than its factorization.

28322028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37483 (or 37475 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28322028 is about 5321.8444171171. The cubic root of 28322028 is about 304.8185896034.

The spelling of 28322028 in words is "twenty-eight million, three hundred twenty-two thousand, twenty-eight".