28427243 has 8 divisors (see below), whose sum is σ = 30662688. Its totient is φ = 26198784.

The previous prime is 28427237. The next prime is 28427261. The reversal of 28427243 is 34272482.

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

It is a cyclic number.

It is not a de Polignac number, because 28427243 - 2⁸ = 28426987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28427233) 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, 9371 + ... + 12027.

It is an arithmetic number, because the mean of its divisors is an integer number (3832836).

Almost surely, 2^28427243 is an apocalyptic number.

28427243 is a deficient number, since it is larger than the sum of its proper divisors (2235445).

28427243 is a wasteful number, since it uses less digits than its factorization.

28427243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3493.

The product of its digits is 21504, while the sum is 32.

The square root of 28427243 is about 5331.7204540373. The cubic root of 28427243 is about 305.1955853818.

The spelling of 28427243 in words is "twenty-eight million, four hundred twenty-seven thousand, two hundred forty-three".