28865145 has 8 divisors (see below), whose sum is σ = 46184256. Its totient is φ = 15394736.

The previous prime is 28865131. The next prime is 28865153. The reversal of 28865145 is 54156882.

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

It is a cyclic number.

It is not a de Polignac number, because 28865145 - 2⁵ = 28865113 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, 962157 + ... + 962186.

It is an arithmetic number, because the mean of its divisors is an integer number (5773032).

Almost surely, 2^28865145 is an apocalyptic number.

It is an amenable number.

28865145 is a deficient number, since it is larger than the sum of its proper divisors (17319111).

28865145 is a wasteful number, since it uses less digits than its factorization.

28865145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924351.

The product of its digits is 76800, while the sum is 39.

The square root of 28865145 is about 5372.6292446064. The cubic root of 28865145 is about 306.7547157118.

The spelling of 28865145 in words is "twenty-eight million, eight hundred sixty-five thousand, one hundred forty-five".