28208535 has 16 divisors (see below), whose sum is σ = 45875040. Its totient is φ = 14797440.

The previous prime is 28208489. The next prime is 28208539. The reversal of 28208535 is 53580282.

It is not a de Polignac number, because 28208535 - 2¹⁰ = 28207511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28208496 and 28208505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28208539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14500 + ... + 16329.

It is an arithmetic number, because the mean of its divisors is an integer number (2867190).

Almost surely, 2^28208535 is an apocalyptic number.

28208535 is a deficient number, since it is larger than the sum of its proper divisors (17666505).

28208535 is a wasteful number, since it uses less digits than its factorization.

28208535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30898.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 28208535 is about 5311.1707748857. The cubic root of 28208535 is about 304.4108846993.

The spelling of 28208535 in words is "twenty-eight million, two hundred eight thousand, five hundred thirty-five".