28922849 has 4 divisors (see below), whose sum is σ = 29193264. Its totient is φ = 28652436.

The previous prime is 28922833. The next prime is 28922857. The reversal of 28922849 is 94822982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28922849 - 2⁴ = 28922833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28922879) 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, 135047 + ... + 135260.

It is an arithmetic number, because the mean of its divisors is an integer number (7298316).

Almost surely, 2^28922849 is an apocalyptic number.

It is an amenable number.

28922849 is a deficient number, since it is larger than the sum of its proper divisors (270415).

28922849 is a wasteful number, since it uses less digits than its factorization.

28922849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270414.

The product of its digits is 165888, while the sum is 44.

The square root of 28922849 is about 5377.9967460012. The cubic root of 28922849 is about 306.9589896660.

The spelling of 28922849 in words is "twenty-eight million, nine hundred twenty-two thousand, eight hundred forty-nine".