28628199 has 6 divisors (see below), whose sum is σ = 41351856. Its totient is φ = 19085460.

The previous prime is 28628177. The next prime is 28628203. The reversal of 28628199 is 99182682.

28628199 is a `hidden beast` number, since 2 + 8 + 628 + 19 + 9 = 666.

It is not a de Polignac number, because 28628199 - 2¹⁵ = 28595431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28621199) 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, 1590447 + ... + 1590464.

It is an arithmetic number, because the mean of its divisors is an integer number (6891976).

Almost surely, 2^28628199 is an apocalyptic number.

28628199 is a deficient number, since it is larger than the sum of its proper divisors (12723657).

28628199 is a wasteful number, since it uses less digits than its factorization.

28628199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3180917 (or 3180914 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 28628199 is about 5350.5325903129. The cubic root of 28628199 is about 305.9130536007.

The spelling of 28628199 in words is "twenty-eight million, six hundred twenty-eight thousand, one hundred ninety-nine".