28012243 has 8 divisors (see below), whose sum is σ = 33897312. Its totient is φ = 22598016.

The previous prime is 28012241. The next prime is 28012267. The reversal of 28012243 is 34221082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28012243 - 2¹ = 28012241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28012241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117580 + ... + 117817.

It is an arithmetic number, because the mean of its divisors is an integer number (4237164).

Almost surely, 2^28012243 is an apocalyptic number.

28012243 is a deficient number, since it is larger than the sum of its proper divisors (5885069).

28012243 is a wasteful number, since it uses less digits than its factorization.

28012243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235421.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 28012243 is about 5292.6593504589. The cubic root of 28012243 is about 303.7031490228.

The spelling of 28012243 in words is "twenty-eight million, twelve thousand, two hundred forty-three".