28986768 has 80 divisors (see below), whose sum is σ = 88119360. Its totient is φ = 9091584.

The previous prime is 28986743. The next prime is 28986781. The reversal of 28986768 is 86768982.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5371 + ... + 9317.

It is an arithmetic number, because the mean of its divisors is an integer number (1101492).

Almost surely, 2^28986768 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 28986768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44059680).

28986768 is an abundant number, since it is smaller than the sum of its proper divisors (59132592).

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

28986768 is a wasteful number, since it uses less digits than its factorization.

28986768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3981 (or 3969 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 28986768 is about 5383.9361066045. The cubic root of 28986768 is about 307.1849479930.

The spelling of 28986768 in words is "twenty-eight million, nine hundred eighty-six thousand, seven hundred sixty-eight".