28508922 has 40 divisors (see below), whose sum is σ = 68800116. Its totient is φ = 8771328.

The previous prime is 28508903. The next prime is 28508947. The reversal of 28508922 is 22980582.

It can be written as a sum of positive squares in 2 ways, for example, as 28100601 + 408321 = 5301^2 + 639^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4663 + ... + 8874.

Almost surely, 2^28508922 is an apocalyptic number.

28508922 is an abundant number, since it is smaller than the sum of its proper divisors (40291194).

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

28508922 is a wasteful number, since it uses less digits than its factorization.

28508922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13564 (or 13555 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28508922 is about 5339.3746824886. The cubic root of 28508922 is about 305.4876084630.

The spelling of 28508922 in words is "twenty-eight million, five hundred eight thousand, nine hundred twenty-two".