28799817 has 4 divisors (see below), whose sum is σ = 38399760. Its totient is φ = 19199876.

The previous prime is 28799807. The next prime is 28799821. The reversal of 28799817 is 71899782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28799817 - 2¹⁰ = 28798793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28799817.

It is not an unprimeable number, because it can be changed into a prime (28799807) 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, 4799967 + ... + 4799972.

It is an arithmetic number, because the mean of its divisors is an integer number (9599940).

Almost surely, 2^28799817 is an apocalyptic number.

It is an amenable number.

28799817 is a deficient number, since it is larger than the sum of its proper divisors (9599943).

28799817 is an equidigital number, since it uses as much as digits as its factorization.

28799817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9599942.

The product of its digits is 508032, while the sum is 51.

The square root of 28799817 is about 5366.5460959541. The cubic root of 28799817 is about 306.5231237217.

The spelling of 28799817 in words is "twenty-eight million, seven hundred ninety-nine thousand, eight hundred seventeen".