28340042 has 8 divisors (see below), whose sum is σ = 42698016. Its totient is φ = 14107372.

The previous prime is 28340041. The next prime is 28340069. The reversal of 28340042 is 24004382.

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

It is not an unprimeable number, because it can be changed into a prime (28340041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30758 + ... + 31665.

It is an arithmetic number, because the mean of its divisors is an integer number (5337252).

Almost surely, 2^28340042 is an apocalyptic number.

28340042 is a deficient number, since it is larger than the sum of its proper divisors (14357974).

28340042 is a wasteful number, since it uses less digits than its factorization.

28340042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62652.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 28340042 is about 5323.5366064300. The cubic root of 28340042 is about 304.8832017175.

The spelling of 28340042 in words is "twenty-eight million, three hundred forty thousand, forty-two".