28712807 has 2 divisors, whose sum is σ = 28712808. Its totient is φ = 28712806.

The previous prime is 28712759. The next prime is 28712837. The reversal of 28712807 is 70821782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28712807 - 2¹⁸ = 28450663 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28712837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14356403 + 14356404.

It is an arithmetic number, because the mean of its divisors is an integer number (14356404).

Almost surely, 2^28712807 is an apocalyptic number.

28712807 is a deficient number, since it is larger than the sum of its proper divisors (1).

28712807 is an equidigital number, since it uses as much as digits as its factorization.

28712807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 28712807 is about 5358.4332598251. The cubic root of 28712807 is about 306.2141231331.

The spelling of 28712807 in words is "twenty-eight million, seven hundred twelve thousand, eight hundred seven".