28550768 has 30 divisors (see below), whose sum is σ = 58393584. Its totient is φ = 13521312.

The previous prime is 28550747. The next prime is 28550779. The reversal of 28550768 is 86705582.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 3305 + ... + 8247.

Almost surely, 2^28550768 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 28550768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29196792).

28550768 is an abundant number, since it is smaller than the sum of its proper divisors (29842816).

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

28550768 is a wasteful number, since it uses less digits than its factorization.

28550768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4989 (or 4964 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 28550768 is about 5343.2918692506. The cubic root of 28550768 is about 305.6370024546.

The spelling of 28550768 in words is "twenty-eight million, five hundred fifty thousand, seven hundred sixty-eight".