28454291 has 4 divisors (see below), whose sum is σ = 28495584. Its totient is φ = 28413000.

The previous prime is 28454281. The next prime is 28454351. The reversal of 28454291 is 19245482.

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 28454291 - 2⁶ = 28454227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28454201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19595 + ... + 20996.

It is an arithmetic number, because the mean of its divisors is an integer number (7123896).

Almost surely, 2^28454291 is an apocalyptic number.

28454291 is a deficient number, since it is larger than the sum of its proper divisors (41293).

28454291 is an equidigital number, since it uses as much as digits as its factorization.

28454291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41292.

The product of its digits is 23040, while the sum is 35.

The square root of 28454291 is about 5334.2563680423. The cubic root of 28454291 is about 305.2923506976.

The spelling of 28454291 in words is "twenty-eight million, four hundred fifty-four thousand, two hundred ninety-one".