28194213 has 8 divisors (see below), whose sum is σ = 37879776. Its totient is φ = 18652400.

The previous prime is 28194193. The next prime is 28194223. The reversal of 28194213 is 31249182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28194213 - 2⁵ = 28194181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28194223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35478 + ... + 36263.

It is an arithmetic number, because the mean of its divisors is an integer number (4734972).

Almost surely, 2^28194213 is an apocalyptic number.

It is an amenable number.

28194213 is a deficient number, since it is larger than the sum of its proper divisors (9685563).

28194213 is a wasteful number, since it uses less digits than its factorization.

28194213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71875.

The product of its digits is 3456, while the sum is 30.

The square root of 28194213 is about 5309.8223134113. The cubic root of 28194213 is about 304.3593576142.

The spelling of 28194213 in words is "twenty-eight million, one hundred ninety-four thousand, two hundred thirteen".