28931043 has 8 divisors (see below), whose sum is σ = 38852800. Its totient is φ = 19148328.

The previous prime is 28931041. The next prime is 28931047. The reversal of 28931043 is 34013982.

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

It is not a de Polignac number, because 28931043 - 2¹ = 28931041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28931043.

It is not an unprimeable number, because it can be changed into a prime (28931041) 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, 34273 + ... + 35106.

It is an arithmetic number, because the mean of its divisors is an integer number (4856600).

Almost surely, 2^28931043 is an apocalyptic number.

28931043 is a deficient number, since it is larger than the sum of its proper divisors (9921757).

28931043 is a wasteful number, since it uses less digits than its factorization.

28931043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69521.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 28931043 is about 5378.7584998771. The cubic root of 28931043 is about 306.9879746445.

The spelling of 28931043 in words is "twenty-eight million, nine hundred thirty-one thousand, forty-three".