28740843 has 12 divisors (see below), whose sum is σ = 41590848. Its totient is φ = 19125360.

The previous prime is 28740799. The next prime is 28740851. The reversal of 28740843 is 34804782.

It is not a de Polignac number, because 28740843 - 2⁶ = 28740779 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28740798 and 28740807.

It is not an unprimeable number, because it can be changed into a prime (28740853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2833 + ... + 8093.

It is an arithmetic number, because the mean of its divisors is an integer number (3465904).

Almost surely, 2^28740843 is an apocalyptic number.

28740843 is a deficient number, since it is larger than the sum of its proper divisors (12850005).

28740843 is a wasteful number, since it uses less digits than its factorization.

28740843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5874 (or 5871 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 28740843 is about 5361.0486847258. The cubic root of 28740843 is about 306.3137561000.

The spelling of 28740843 in words is "twenty-eight million, seven hundred forty thousand, eight hundred forty-three".