28418243 has 16 divisors (see below), whose sum is σ = 34667520. Its totient is φ = 22752576.

The previous prime is 28418239. The next prime is 28418263. The reversal of 28418243 is 34281482.

It is not a de Polignac number, because 28418243 - 2² = 28418239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28418233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8246 + ... + 11172.

It is an arithmetic number, because the mean of its divisors is an integer number (2166720).

Almost surely, 2^28418243 is an apocalyptic number.

28418243 is a deficient number, since it is larger than the sum of its proper divisors (6249277).

28418243 is a wasteful number, since it uses less digits than its factorization.

28418243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026.

The product of its digits is 12288, while the sum is 32.

The square root of 28418243 is about 5330.8763819845. The cubic root of 28418243 is about 305.1633739079.

The spelling of 28418243 in words is "twenty-eight million, four hundred eighteen thousand, two hundred forty-three".