28638196 has 24 divisors (see below), whose sum is σ = 52093440. Its totient is φ = 13759200.

The previous prime is 28638193. The next prime is 28638209. The reversal of 28638196 is 69183682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28638191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30981 + ... + 31891.

It is an arithmetic number, because the mean of its divisors is an integer number (2170560).

Almost surely, 2^28638196 is an apocalyptic number.

It is an amenable number.

28638196 is a deficient number, since it is larger than the sum of its proper divisors (23455244).

28638196 is a wasteful number, since it uses less digits than its factorization.

28638196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215 (or 1213 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 28638196 is about 5351.4667148362. The cubic root of 28638196 is about 305.9486578534.

The spelling of 28638196 in words is "twenty-eight million, six hundred thirty-eight thousand, one hundred ninety-six".