28885807 has 2 divisors, whose sum is σ = 28885808. Its totient is φ = 28885806.

The previous prime is 28885793. The next prime is 28885811. The reversal of 28885807 is 70858882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28885807 - 2⁷ = 28885679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28885897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14442903 + 14442904.

It is an arithmetic number, because the mean of its divisors is an integer number (14442904).

Almost surely, 2^28885807 is an apocalyptic number.

28885807 is a deficient number, since it is larger than the sum of its proper divisors (1).

28885807 is an equidigital number, since it uses as much as digits as its factorization.

28885807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 286720, while the sum is 46.

The square root of 28885807 is about 5374.5517952663. The cubic root of 28885807 is about 306.8278910960.

It can be divided in two parts, 28885 and 807, that added together give a palindrome (29692).

The spelling of 28885807 in words is "twenty-eight million, eight hundred eighty-five thousand, eight hundred seven".