28974291 has 4 divisors (see below), whose sum is σ = 38632392. Its totient is φ = 19316192.

The previous prime is 28974289. The next prime is 28974317. The reversal of 28974291 is 19247982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28974291 - 2¹ = 28974289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28974241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4829046 + ... + 4829051.

It is an arithmetic number, because the mean of its divisors is an integer number (9658098).

Almost surely, 2^28974291 is an apocalyptic number.

28974291 is a deficient number, since it is larger than the sum of its proper divisors (9658101).

28974291 is an equidigital number, since it uses as much as digits as its factorization.

28974291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9658100.

The product of its digits is 72576, while the sum is 42.

The square root of 28974291 is about 5382.7772571415. Note that the first 3 decimals coincide. The cubic root of 28974291 is about 307.1408669989.

The spelling of 28974291 in words is "twenty-eight million, nine hundred seventy-four thousand, two hundred ninety-one".