28347145 has 16 divisors (see below), whose sum is σ = 36167040. Its totient is φ = 21268224.

The previous prime is 28347139. The next prime is 28347173. The reversal of 28347145 is 54174382.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28347145 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28347145.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8337 + ... + 11233.

It is an arithmetic number, because the mean of its divisors is an integer number (2260440).

Almost surely, 2^28347145 is an apocalyptic number.

It is an amenable number.

28347145 is a deficient number, since it is larger than the sum of its proper divisors (7819895).

28347145 is a wasteful number, since it uses less digits than its factorization.

28347145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024.

The product of its digits is 26880, while the sum is 34.

The square root of 28347145 is about 5324.2036963287. The cubic root of 28347145 is about 304.9086710338.

The spelling of 28347145 in words is "twenty-eight million, three hundred forty-seven thousand, one hundred forty-five".