28947243 has 16 divisors (see below), whose sum is σ = 44011296. Its totient is φ = 16765440.

The previous prime is 28947181. The next prime is 28947251. The reversal of 28947243 is 34274982.

It is not a de Polignac number, because 28947243 - 2¹² = 28943147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (28947293) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21168 + ... + 22493.

It is an arithmetic number, because the mean of its divisors is an integer number (2750706).

Almost surely, 2^28947243 is an apocalyptic number.

28947243 is a deficient number, since it is larger than the sum of its proper divisors (15064053).

28947243 is a wasteful number, since it uses less digits than its factorization.

28947243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43694.

The product of its digits is 96768, while the sum is 39.

The square root of 28947243 is about 5380.2642128431. The cubic root of 28947243 is about 307.0452634793.

The spelling of 28947243 in words is "twenty-eight million, nine hundred forty-seven thousand, two hundred forty-three".