28864511 has 8 divisors (see below), whose sum is σ = 31612560. Its totient is φ = 26191872.

The previous prime is 28864499. The next prime is 28864519. The reversal of 28864511 is 11546882.

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 28864511 - 2¹⁰ = 28863487 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 (28864519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18050 + ... + 19583.

It is an arithmetic number, because the mean of its divisors is an integer number (3951570).

Almost surely, 2^28864511 is an apocalyptic number.

28864511 is a deficient number, since it is larger than the sum of its proper divisors (2748049).

28864511 is a wasteful number, since it uses less digits than its factorization.

28864511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37705.

The product of its digits is 15360, while the sum is 35.

The square root of 28864511 is about 5372.5702415138. The cubic root of 28864511 is about 306.7524698207.

The spelling of 28864511 in words is "twenty-eight million, eight hundred sixty-four thousand, five hundred eleven".