28768867 has 4 divisors (see below), whose sum is σ = 28883736. Its totient is φ = 28654000.

The previous prime is 28768843. The next prime is 28768889. The reversal of 28768867 is 76886782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28768867 - 2¹¹ = 28766819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28768897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57058 + ... + 57559.

It is an arithmetic number, because the mean of its divisors is an integer number (7220934).

Almost surely, 2^28768867 is an apocalyptic number.

28768867 is a deficient number, since it is larger than the sum of its proper divisors (114869).

28768867 is a wasteful number, since it uses less digits than its factorization.

28768867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114868.

The product of its digits is 1806336, while the sum is 52.

The square root of 28768867 is about 5363.6617156566. The cubic root of 28768867 is about 306.4132816915.

The spelling of 28768867 in words is "twenty-eight million, seven hundred sixty-eight thousand, eight hundred sixty-seven".