28807943 has 2 divisors, whose sum is σ = 28807944. Its totient is φ = 28807942.

The previous prime is 28807939. The next prime is 28807951. The reversal of 28807943 is 34970882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28807943 - 2² = 28807939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28807943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28807913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14403971 + 14403972.

It is an arithmetic number, because the mean of its divisors is an integer number (14403972).

Almost surely, 2^28807943 is an apocalyptic number.

28807943 is a deficient number, since it is larger than the sum of its proper divisors (1).

28807943 is an equidigital number, since it uses as much as digits as its factorization.

28807943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 28807943 is about 5367.3031403117. The cubic root of 28807943 is about 306.5519499775.

The spelling of 28807943 in words is "twenty-eight million, eight hundred seven thousand, nine hundred forty-three".