28199212 has 24 divisors (see below), whose sum is σ = 51674112. Its totient is φ = 13448400.

The previous prime is 28199203. The next prime is 28199221. The reversal of 28199212 is 21299182.

It is an interprime number because it is at equal distance from previous prime (28199203) and next prime (28199221).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7203 + ... + 10405.

It is an arithmetic number, because the mean of its divisors is an integer number (2153088).

Almost surely, 2^28199212 is an apocalyptic number.

It is an amenable number.

28199212 is a deficient number, since it is larger than the sum of its proper divisors (23474900).

28199212 is a wasteful number, since it uses less digits than its factorization.

28199212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309 (or 3307 counting only the distinct ones).

The product of its digits is 5184, while the sum is 34.

The square root of 28199212 is about 5310.2930239300. The cubic root of 28199212 is about 304.3773447867.

The spelling of 28199212 in words is "twenty-eight million, one hundred ninety-nine thousand, two hundred twelve".