28888667 has 4 divisors (see below), whose sum is σ = 30144720. Its totient is φ = 27632616.

The previous prime is 28888663. The next prime is 28888681. The reversal of 28888667 is 76688882.

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 28888667 - 2² = 28888663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28888663) 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, 627992 + ... + 628037.

It is an arithmetic number, because the mean of its divisors is an integer number (7536180).

Almost surely, 2^28888667 is an apocalyptic number.

28888667 is a deficient number, since it is larger than the sum of its proper divisors (1256053).

28888667 is a wasteful number, since it uses less digits than its factorization.

28888667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256052.

The product of its digits is 2064384, while the sum is 53.

The square root of 28888667 is about 5374.8178573790. The cubic root of 28888667 is about 306.8380171625.

The spelling of 28888667 in words is "twenty-eight million, eight hundred eighty-eight thousand, six hundred sixty-seven".