28800539 has 4 divisors (see below), whose sum is σ = 28959840. Its totient is φ = 28641240.

The previous prime is 28800517. The next prime is 28800547. The reversal of 28800539 is 93500882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28800539 - 2⁸ = 28800283 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28800499 and 28800508.

It is not an unprimeable number, because it can be changed into a prime (28800559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79379 + ... + 79740.

It is an arithmetic number, because the mean of its divisors is an integer number (7239960).

Almost surely, 2^28800539 is an apocalyptic number.

28800539 is a deficient number, since it is larger than the sum of its proper divisors (159301).

28800539 is a wasteful number, since it uses less digits than its factorization.

28800539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159300.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 28800539 is about 5366.6133641245. The cubic root of 28800539 is about 306.5256851713.

The spelling of 28800539 in words is "twenty-eight million, eight hundred thousand, five hundred thirty-nine".