28933867 has 2 divisors, whose sum is σ = 28933868. Its totient is φ = 28933866.

The previous prime is 28933843. The next prime is 28933939. The reversal of 28933867 is 76833982.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28933867 is a prime.

It is not a weakly prime, because it can be changed into another prime (28931867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14466933 + 14466934.

It is an arithmetic number, because the mean of its divisors is an integer number (14466934).

Almost surely, 2^28933867 is an apocalyptic number.

28933867 is a deficient number, since it is larger than the sum of its proper divisors (1).

28933867 is an equidigital number, since it uses as much as digits as its factorization.

28933867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 28933867 is about 5379.0210075812. The cubic root of 28933867 is about 306.9979628296.

The spelling of 28933867 in words is "twenty-eight million, nine hundred thirty-three thousand, eight hundred sixty-seven".