28570879 has 2 divisors, whose sum is σ = 28570880. Its totient is φ = 28570878.

The previous prime is 28570847. The next prime is 28570907. The reversal of 28570879 is 97807582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28570879 - 2⁵ = 28570847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28570079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14285439 + 14285440.

It is an arithmetic number, because the mean of its divisors is an integer number (14285440).

Almost surely, 2^28570879 is an apocalyptic number.

28570879 is a deficient number, since it is larger than the sum of its proper divisors (1).

28570879 is an equidigital number, since it uses as much as digits as its factorization.

28570879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 28570879 is about 5345.1734303014. The cubic root of 28570879 is about 305.7087486052.

The spelling of 28570879 in words is "twenty-eight million, five hundred seventy thousand, eight hundred seventy-nine".