28765608 has 32 divisors (see below), whose sum is σ = 72632160. Its totient is φ = 9492800.

The previous prime is 28765603. The next prime is 28765609. The reversal of 28765608 is 80656782.

It is a self number, because there is not a number n which added to its sum of digits gives 28765608.

It is not an unprimeable number, because it can be changed into a prime (28765603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3510 + ... + 8357.

It is an arithmetic number, because the mean of its divisors is an integer number (2269755).

Almost surely, 2^28765608 is an apocalyptic number.

It is an amenable number.

28765608 is an abundant number, since it is smaller than the sum of its proper divisors (43866552).

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

28765608 is a wasteful number, since it uses less digits than its factorization.

28765608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11977 (or 11973 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 28765608 is about 5363.3579034034. The cubic root of 28765608 is about 306.4017108663.

The spelling of 28765608 in words is "twenty-eight million, seven hundred sixty-five thousand, six hundred eight".