28931042 has 16 divisors (see below), whose sum is σ = 52513920. Its totient is φ = 11669568.

The previous prime is 28931041. The next prime is 28931047. The reversal of 28931042 is 24013982.

It is a junction number, because it is equal to n+sod(n) for n = 28930996 and 28931014.

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, 60542 + ... + 61017.

It is an arithmetic number, because the mean of its divisors is an integer number (3282120).

Almost surely, 2^28931042 is an apocalyptic number.

28931042 is a deficient number, since it is larger than the sum of its proper divisors (23582878).

28931042 is a wasteful number, since it uses less digits than its factorization.

28931042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121585.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 28931042 is about 5378.7584069188. The cubic root of 28931042 is about 306.9879711075.

The spelling of 28931042 in words is "twenty-eight million, nine hundred thirty-one thousand, forty-two".