28767808 has 56 divisors (see below), whose sum is σ = 61200792. Its totient is φ = 13369344.

The previous prime is 28767787. The next prime is 28767821. The reversal of 28767808 is 80876782.

It can be written as a sum of positive squares in 4 ways, for example, as 5419584 + 23348224 = 2328^2 + 4832^2 .

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 7 ways as a sum of consecutive naturals, for example, 148960 + ... + 149152.

Almost surely, 2^28767808 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 28767808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30600396).

28767808 is an abundant number, since it is smaller than the sum of its proper divisors (32432984).

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

28767808 is a wasteful number, since it uses less digits than its factorization.

28767808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 46.

The square root of 28767808 is about 5363.5629948757. The cubic root of 28767808 is about 306.4095218905.

The spelling of 28767808 in words is "twenty-eight million, seven hundred sixty-seven thousand, eight hundred eight".