28908922 has 12 divisors (see below), whose sum is σ = 50443290. Its totient is φ = 12389496.

The previous prime is 28908839. The next prime is 28908931. The reversal of 28908922 is 22980982.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16313521 + 12595401 = 4039^2 + 3549^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 147397 + ... + 147592.

Almost surely, 2^28908922 is an apocalyptic number.

28908922 is a deficient number, since it is larger than the sum of its proper divisors (21534368).

28908922 is a wasteful number, since it uses less digits than its factorization.

28908922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295005 (or 294998 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 28908922 is about 5376.7017771121. The cubic root of 28908922 is about 306.9097125448.

The spelling of 28908922 in words is "twenty-eight million, nine hundred eight thousand, nine hundred twenty-two".