28538199 has 6 divisors (see below), whose sum is σ = 41221856. Its totient is φ = 19025460.

The previous prime is 28538183. The next prime is 28538227. The reversal of 28538199 is 99183582.

It is a happy number.

28538199 is a `hidden beast` number, since 28 + 538 + 1 + 99 = 666.

It is not a de Polignac number, because 28538199 - 2⁴ = 28538183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28538099) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1585447 + ... + 1585464.

Almost surely, 2^28538199 is an apocalyptic number.

28538199 is a deficient number, since it is larger than the sum of its proper divisors (12683657).

28538199 is a wasteful number, since it uses less digits than its factorization.

28538199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170917 (or 3170914 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 28538199 is about 5342.1155921601. The cubic root of 28538199 is about 305.5921453385.

The spelling of 28538199 in words is "twenty-eight million, five hundred thirty-eight thousand, one hundred ninety-nine".