28793808 has 60 divisors (see below), whose sum is σ = 82565028. Its totient is φ = 9361920.

The previous prime is 28793777. The next prime is 28793813. The reversal of 28793808 is 80839782.

It can be written as a sum of positive squares in 2 ways, for example, as 4112784 + 24681024 = 2028^2 + 4968^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3466 + ... + 8342.

Almost surely, 2^28793808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28793808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41282514).

28793808 is an abundant number, since it is smaller than the sum of its proper divisors (53771220).

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

28793808 is a wasteful number, since it uses less digits than its factorization.

28793808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932 (or 4923 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 28793808 is about 5365.9862094493. The cubic root of 28793808 is about 306.5018038458.

The spelling of 28793808 in words is "twenty-eight million, seven hundred ninety-three thousand, eight hundred eight".