28345027 has 4 divisors (see below), whose sum is σ = 28359936. Its totient is φ = 28330120.

The previous prime is 28345021. The next prime is 28345061. The reversal of 28345027 is 72054382.

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-28345027 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28345027.

It is not an unprimeable number, because it can be changed into a prime (28345021) 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, 4099 + ... + 8572.

It is an arithmetic number, because the mean of its divisors is an integer number (7089984).

Almost surely, 2^28345027 is an apocalyptic number.

28345027 is a deficient number, since it is larger than the sum of its proper divisors (14909).

28345027 is a wasteful number, since it uses less digits than its factorization.

28345027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14908.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 28345027 is about 5324.0047896297. The cubic root of 28345027 is about 304.9010769398.

The spelling of 28345027 in words is "twenty-eight million, three hundred forty-five thousand, twenty-seven".