28083505 has 16 divisors (see below), whose sum is σ = 34352640. Its totient is φ = 22036608.

The previous prime is 28083499. The next prime is 28083511. The reversal of 28083505 is 50538082.

It is an interprime number because it is at equal distance from previous prime (28083499) and next prime (28083511).

It is a cyclic number.

It is not a de Polignac number, because 28083505 - 2¹¹ = 28081457 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99094 + ... + 99376.

It is an arithmetic number, because the mean of its divisors is an integer number (2147040).

Almost surely, 2^28083505 is an apocalyptic number.

It is an amenable number.

28083505 is a deficient number, since it is larger than the sum of its proper divisors (6269135).

28083505 is a wasteful number, since it uses less digits than its factorization.

28083505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 28083505 is about 5299.3872287275. The cubic root of 28083505 is about 303.9604670719.

The spelling of 28083505 in words is "twenty-eight million, eighty-three thousand, five hundred five".