28208536 has 16 divisors (see below), whose sum is σ = 52988040. Its totient is φ = 14078400.

The previous prime is 28208489. The next prime is 28208539. The reversal of 28208536 is 63580282.

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 3 ways as a sum of consecutive naturals, for example, 1875 + ... + 7741.

Almost surely, 2^28208536 is an apocalyptic number.

It is an amenable number.

28208536 is a deficient number, since it is larger than the sum of its proper divisors (24779504).

28208536 is a wasteful number, since it uses less digits than its factorization.

28208536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6474 (or 6470 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28208536 is about 5311.1708690269. The cubic root of 28208536 is about 304.4108882964.

The spelling of 28208536 in words is "twenty-eight million, two hundred eight thousand, five hundred thirty-six".