28923808 has 24 divisors (see below), whose sum is σ = 57181572. Its totient is φ = 14401536.

The previous prime is 28923803. The next prime is 28923823. The reversal of 28923808 is 80832982.

It can be written as a sum of positive squares in 2 ways, for example, as 19114384 + 9809424 = 4372^2 + 3132^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28923803) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6466 + ... + 9982.

Almost surely, 2^28923808 is an apocalyptic number.

It is an amenable number.

28923808 is a deficient number, since it is larger than the sum of its proper divisors (28257764).

28923808 is a wasteful number, since it uses less digits than its factorization.

28923808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784 (or 3776 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 28923808 is about 5378.0859048550. The cubic root of 28923808 is about 306.9623822596.

The spelling of 28923808 in words is "twenty-eight million, nine hundred twenty-three thousand, eight hundred eight".