28475138 has 8 divisors (see below), whose sum is σ = 43621632. Its totient is φ = 13934596.

The previous prime is 28475099. The next prime is 28475147. The reversal of 28475138 is 83157482.

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, 151370 + ... + 151557.

It is an arithmetic number, because the mean of its divisors is an integer number (5452704).

Almost surely, 2^28475138 is an apocalyptic number.

28475138 is a deficient number, since it is larger than the sum of its proper divisors (15146494).

28475138 is a wasteful number, since it uses less digits than its factorization.

28475138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302976.

The product of its digits is 53760, while the sum is 38.

The square root of 28475138 is about 5336.2100783234. The cubic root of 28475138 is about 305.3668898473.

The spelling of 28475138 in words is "twenty-eight million, four hundred seventy-five thousand, one hundred thirty-eight".