28717835 has 32 divisors (see below), whose sum is σ = 38041920. Its totient is φ = 20736000.

The previous prime is 28717807. The next prime is 28717847. The reversal of 28717835 is 53871782.

It is not a de Polignac number, because 28717835 - 2¹⁴ = 28701451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 28717792 and 28717801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284285 + ... + 284385.

It is an arithmetic number, because the mean of its divisors is an integer number (1188810).

Almost surely, 2^28717835 is an apocalyptic number.

28717835 is a deficient number, since it is larger than the sum of its proper divisors (9324085).

28717835 is a wasteful number, since it uses less digits than its factorization.

28717835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239.

The product of its digits is 94080, while the sum is 41.

The square root of 28717835 is about 5358.9024062769. The cubic root of 28717835 is about 306.2319961650.

The spelling of 28717835 in words is "twenty-eight million, seven hundred seventeen thousand, eight hundred thirty-five".