28940797 has 2 divisors, whose sum is σ = 28940798. Its totient is φ = 28940796.

The previous prime is 28940789. The next prime is 28940881. The reversal of 28940797 is 79704982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27815076 + 1125721 = 5274^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 28940797 - 2³ = 28940789 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 (28940707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14470398 + 14470399.

It is an arithmetic number, because the mean of its divisors is an integer number (14470399).

Almost surely, 2^28940797 is an apocalyptic number.

It is an amenable number.

28940797 is a deficient number, since it is larger than the sum of its proper divisors (1).

28940797 is an equidigital number, since it uses as much as digits as its factorization.

28940797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 28940797 is about 5379.6651382777. The cubic root of 28940797 is about 307.0224707422.

The spelling of 28940797 in words is "twenty-eight million, nine hundred forty thousand, seven hundred ninety-seven".