28905159 has 8 divisors (see below), whose sum is σ = 39436672. Its totient is φ = 18821880.

The previous prime is 28905143. The next prime is 28905167. The reversal of 28905159 is 95150982.

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

It is not a de Polignac number, because 28905159 - 2⁴ = 28905143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28905169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111907 + ... + 112164.

It is an arithmetic number, because the mean of its divisors is an integer number (4929584).

Almost surely, 2^28905159 is an apocalyptic number.

28905159 is a deficient number, since it is larger than the sum of its proper divisors (10531513).

28905159 is a wasteful number, since it uses less digits than its factorization.

28905159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224117.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 28905159 is about 5376.3518300052. The cubic root of 28905159 is about 306.8963954177.

The spelling of 28905159 in words is "twenty-eight million, nine hundred five thousand, one hundred fifty-nine".