28107243 has 10 divisors (see below), whose sum is σ = 41987484. Its totient is φ = 18738108.

The previous prime is 28107227. The next prime is 28107253. The reversal of 28107243 is 34270182.

It is not a de Polignac number, because 28107243 - 2⁴ = 28107227 is a prime.

It is a super-2 number, since 2×28107243² = 1580034218122098, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28107253) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 173421 + ... + 173582.

Almost surely, 2^28107243 is an apocalyptic number.

28107243 is a deficient number, since it is larger than the sum of its proper divisors (13880241).

28107243 is an equidigital number, since it uses as much as digits as its factorization.

28107243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347015 (or 347006 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28107243 is about 5301.6264485533. The cubic root of 28107243 is about 304.0460853205.

The spelling of 28107243 in words is "twenty-eight million, one hundred seven thousand, two hundred forty-three".