28799539 has 2 divisors, whose sum is σ = 28799540. Its totient is φ = 28799538.

The previous prime is 28799509. The next prime is 28799543. The reversal of 28799539 is 93599782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28799539 - 2⁹ = 28799027 is a prime.

It is a super-2 number, since 2×28799539² = 1658826893225042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28799509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14399769 + 14399770.

It is an arithmetic number, because the mean of its divisors is an integer number (14399770).

Almost surely, 2^28799539 is an apocalyptic number.

28799539 is a deficient number, since it is larger than the sum of its proper divisors (1).

28799539 is an equidigital number, since it uses as much as digits as its factorization.

28799539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 52.

The square root of 28799539 is about 5366.5201946885. The cubic root of 28799539 is about 306.5221374457.

The spelling of 28799539 in words is "twenty-eight million, seven hundred ninety-nine thousand, five hundred thirty-nine".