28261579 has 2 divisors, whose sum is σ = 28261580. Its totient is φ = 28261578.

The previous prime is 28261567. The next prime is 28261591. The reversal of 28261579 is 97516282.

It is a balanced prime because it is at equal distance from previous prime (28261567) and next prime (28261591).

It is a cyclic number.

It is not a de Polignac number, because 28261579 - 2⁹ = 28261067 is a prime.

It is a Chen prime.

It is equal to p_1756687 and since 28261579 and 1756687 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28261279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14130789 + 14130790.

It is an arithmetic number, because the mean of its divisors is an integer number (14130790).

Almost surely, 2^28261579 is an apocalyptic number.

28261579 is a deficient number, since it is larger than the sum of its proper divisors (1).

28261579 is an equidigital number, since it uses as much as digits as its factorization.

28261579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 28261579 is about 5316.1620554682. The cubic root of 28261579 is about 304.6015723801.

The spelling of 28261579 in words is "twenty-eight million, two hundred sixty-one thousand, five hundred seventy-nine".