28235138 has 8 divisors (see below), whose sum is σ = 42949440. Its totient is φ = 13918660.

The previous prime is 28235111. The next prime is 28235149. The reversal of 28235138 is 83153282.

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

It is an unprimeable number.

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, 99278 + ... + 99561.

It is an arithmetic number, because the mean of its divisors is an integer number (5368680).

Almost surely, 2^28235138 is an apocalyptic number.

28235138 is a deficient number, since it is larger than the sum of its proper divisors (14714302).

28235138 is a wasteful number, since it uses less digits than its factorization.

28235138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198912.

The product of its digits is 11520, while the sum is 32.

The square root of 28235138 is about 5313.6746230834. The cubic root of 28235138 is about 304.5065495790.

The spelling of 28235138 in words is "twenty-eight million, two hundred thirty-five thousand, one hundred thirty-eight".