28345799 has 4 divisors (see below), whose sum is σ = 28371336. Its totient is φ = 28320264.

The previous prime is 28345781. The next prime is 28345813. The reversal of 28345799 is 99754382.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28345799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28345099) 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, 11024 + ... + 13349.

It is an arithmetic number, because the mean of its divisors is an integer number (7092834).

Almost surely, 2^28345799 is an apocalyptic number.

28345799 is a deficient number, since it is larger than the sum of its proper divisors (25537).

28345799 is a wasteful number, since it uses less digits than its factorization.

28345799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25536.

The product of its digits is 544320, while the sum is 47.

The square root of 28345799 is about 5324.0772909491. The cubic root of 28345799 is about 304.9038449915.

The spelling of 28345799 in words is "twenty-eight million, three hundred forty-five thousand, seven hundred ninety-nine".