28767888 has 30 divisors (see below), whose sum is σ = 80510534. Its totient is φ = 9589248.

The previous prime is 28767839. The next prime is 28767911. The reversal of 28767888 is 88876782.

It can be written as a sum of positive squares in only one way, i.e., 27751824 + 1016064 = 5268^2 + 1008^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99745 + ... + 100032.

Almost surely, 2^28767888 is an apocalyptic number.

It is an amenable number.

28767888 is an abundant number, since it is smaller than the sum of its proper divisors (51742646).

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

28767888 is a wasteful number, since it uses less digits than its factorization.

28767888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199791 (or 199782 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The square root of 28767888 is about 5363.5704525996. The cubic root of 28767888 is about 306.4098059202.

The spelling of 28767888 in words is "twenty-eight million, seven hundred sixty-seven thousand, eight hundred eighty-eight".