28968291 has 24 divisors (see below), whose sum is σ = 47124480. Its totient is φ = 16988400.

The previous prime is 28968287. The next prime is 28968307. The reversal of 28968291 is 19286982.

It is not a de Polignac number, because 28968291 - 2² = 28968287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28968211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1651 + ... + 7788.

It is an arithmetic number, because the mean of its divisors is an integer number (1963520).

Almost surely, 2^28968291 is an apocalyptic number.

28968291 is a deficient number, since it is larger than the sum of its proper divisors (18156189).

28968291 is a wasteful number, since it uses less digits than its factorization.

28968291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9487 (or 9484 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 28968291 is about 5382.2198951734. The cubic root of 28968291 is about 307.1196646115.

The spelling of 28968291 in words is "twenty-eight million, nine hundred sixty-eight thousand, two hundred ninety-one".