28895138 has 8 divisors (see below), whose sum is σ = 45892332. Its totient is φ = 13597696.

The previous prime is 28895129. The next prime is 28895159. The reversal of 28895138 is 83159882.

It can be written as a sum of positive squares in 2 ways, for example, as 26801329 + 2093809 = 5177^2 + 1447^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424895 + ... + 424962.

Almost surely, 2^28895138 is an apocalyptic number.

28895138 is a deficient number, since it is larger than the sum of its proper divisors (16997194).

28895138 is a wasteful number, since it uses less digits than its factorization.

28895138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849876.

The product of its digits is 138240, while the sum is 44.

The square root of 28895138 is about 5375.4197975600. The cubic root of 28895138 is about 306.8609258066.

The spelling of 28895138 in words is "twenty-eight million, eight hundred ninety-five thousand, one hundred thirty-eight".