28288735 has 8 divisors (see below), whose sum is σ = 35422560. Its totient is φ = 21646944.

The previous prime is 28288703. The next prime is 28288747. The reversal of 28288735 is 53788282.

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 28288735 - 2⁵ = 28288703 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28288691 and 28288700.

It is a congruent number.

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, 122880 + ... + 123109.

It is an arithmetic number, because the mean of its divisors is an integer number (4427820).

Almost surely, 2^28288735 is an apocalyptic number.

28288735 is a deficient number, since it is larger than the sum of its proper divisors (7133825).

28288735 is a wasteful number, since it uses less digits than its factorization.

28288735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246017.

The product of its digits is 215040, while the sum is 43.

The square root of 28288735 is about 5318.7155404289. The cubic root of 28288735 is about 304.6991030514.

The spelling of 28288735 in words is "twenty-eight million, two hundred eighty-eight thousand, seven hundred thirty-five".