28209196 has 12 divisors (see below), whose sum is σ = 49524048. Its totient is φ = 14059472.

The previous prime is 28209193. The next prime is 28209217. The reversal of 28209196 is 69190282.

It is not an unprimeable number, because it can be changed into a prime (28209193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9856 + ... + 12391.

It is an arithmetic number, because the mean of its divisors is an integer number (4127004).

Almost surely, 2^28209196 is an apocalyptic number.

It is an amenable number.

28209196 is a deficient number, since it is larger than the sum of its proper divisors (21314852).

28209196 is a wasteful number, since it uses less digits than its factorization.

28209196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22568 (or 22566 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 28209196 is about 5311.2330018556. The cubic root of 28209196 is about 304.4132623960.

The spelling of 28209196 in words is "twenty-eight million, two hundred nine thousand, one hundred ninety-six".