28228535 has 16 divisors (see below), whose sum is σ = 34670592. Its totient is φ = 22058400.

The previous prime is 28228523. The next prime is 28228553. The reversal of 28228535 is 53582282.

It is a de Polignac number, because none of the positive numbers 2^k-28228535 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28228495 and 28228504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46202 + ... + 46808.

It is an arithmetic number, because the mean of its divisors is an integer number (2166912).

Almost surely, 2^28228535 is an apocalyptic number.

28228535 is a deficient number, since it is larger than the sum of its proper divisors (6442057).

28228535 is a wasteful number, since it uses less digits than its factorization.

28228535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814.

The product of its digits is 38400, while the sum is 35.

The square root of 28228535 is about 5313.0532653080. The cubic root of 28228535 is about 304.4828106772.

The spelling of 28228535 in words is "twenty-eight million, two hundred twenty-eight thousand, five hundred thirty-five".