28801307 has 2 divisors, whose sum is σ = 28801308. Its totient is φ = 28801306.

The previous prime is 28801243. The next prime is 28801319. The reversal of 28801307 is 70310882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28801307 - 2⁶ = 28801243 is a prime.

It is a Chen prime.

It is equal to p_1788140 and since 28801307 and 1788140 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28801307.

It is not a weakly prime, because it can be changed into another prime (28801907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14400653 + 14400654.

It is an arithmetic number, because the mean of its divisors is an integer number (14400654).

Almost surely, 2^28801307 is an apocalyptic number.

28801307 is a deficient number, since it is larger than the sum of its proper divisors (1).

28801307 is an equidigital number, since it uses as much as digits as its factorization.

28801307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 28801307 is about 5366.6849171532. The cubic root of 28801307 is about 306.5284097689.

The spelling of 28801307 in words is "twenty-eight million, eight hundred one thousand, three hundred seven".