28890849 has 32 divisors (see below), whose sum is σ = 44154880. Its totient is φ = 16656192.

The previous prime is 28890817. The next prime is 28890857. The reversal of 28890849 is 94809882.

It is not a de Polignac number, because 28890849 - 2⁵ = 28890817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28890798 and 28890807.

It is not an unprimeable number, because it can be changed into a prime (28890809) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93954 + ... + 94260.

It is an arithmetic number, because the mean of its divisors is an integer number (1379840).

Almost surely, 2^28890849 is an apocalyptic number.

It is an amenable number.

28890849 is a deficient number, since it is larger than the sum of its proper divisors (15264031).

28890849 is a wasteful number, since it uses less digits than its factorization.

28890849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469.

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 28890849 is about 5375.0208371689. The cubic root of 28890849 is about 306.8457422645.

The spelling of 28890849 in words is "twenty-eight million, eight hundred ninety thousand, eight hundred forty-nine".