28159535 has 8 divisors (see below), whose sum is σ = 33819936. Its totient is φ = 22508640.

The previous prime is 28159519. The next prime is 28159541. The reversal of 28159535 is 53595182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28159535 - 2⁴ = 28159519 is a prime.

It is a super-2 number, since 2×28159535² = 1585918822832450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10337 + ... + 12773.

It is an arithmetic number, because the mean of its divisors is an integer number (4227492).

Almost surely, 2^28159535 is an apocalyptic number.

28159535 is a deficient number, since it is larger than the sum of its proper divisors (5660401).

28159535 is a wasteful number, since it uses less digits than its factorization.

28159535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4753.

The product of its digits is 54000, while the sum is 38.

The square root of 28159535 is about 5306.5558510205. Note that the first 3 decimals coincide. The cubic root of 28159535 is about 304.2345222562.

The spelling of 28159535 in words is "twenty-eight million, one hundred fifty-nine thousand, five hundred thirty-five".