28396807 has 2 divisors, whose sum is σ = 28396808. Its totient is φ = 28396806.

The previous prime is 28396801. The next prime is 28396831. The reversal of 28396807 is 70869382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28396807 - 2³ = 28396799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28396801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14198403 + 14198404.

It is an arithmetic number, because the mean of its divisors is an integer number (14198404).

Almost surely, 2^28396807 is an apocalyptic number.

28396807 is a deficient number, since it is larger than the sum of its proper divisors (1).

28396807 is an equidigital number, since it uses as much as digits as its factorization.

28396807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28396807 is about 5328.8654514821. The cubic root of 28396807 is about 305.0866259362.

The spelling of 28396807 in words is "twenty-eight million, three hundred ninety-six thousand, eight hundred seven".