28027345 has 8 divisors (see below), whose sum is σ = 33667560. Its totient is φ = 22398720.

The previous prime is 28027331. The next prime is 28027367. The reversal of 28027345 is 54372082.

It can be written as a sum of positive squares in 4 ways, for example, as 8242641 + 19784704 = 2871^2 + 4448^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28027345 - 2¹¹ = 28025297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3865 + ... + 8425.

It is an arithmetic number, because the mean of its divisors is an integer number (4208445).

Almost surely, 2^28027345 is an apocalyptic number.

It is an amenable number.

28027345 is a deficient number, since it is larger than the sum of its proper divisors (5640215).

28027345 is a wasteful number, since it uses less digits than its factorization.

28027345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5795.

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

The square root of 28027345 is about 5294.0858512117. The cubic root of 28027345 is about 303.7577168412.

The spelling of 28027345 in words is "twenty-eight million, twenty-seven thousand, three hundred forty-five".