28394146 has 8 divisors (see below), whose sum is σ = 46463184. Its totient is φ = 12906420.

The previous prime is 28394143. The next prime is 28394159. The reversal of 28394146 is 64149382.

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

It is not an unprimeable number, because it can be changed into a prime (28394141) 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, 645300 + ... + 645343.

It is an arithmetic number, because the mean of its divisors is an integer number (5807898).

Almost surely, 2^28394146 is an apocalyptic number.

28394146 is a deficient number, since it is larger than the sum of its proper divisors (18069038).

28394146 is a wasteful number, since it uses less digits than its factorization.

28394146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290656.

The product of its digits is 41472, while the sum is 37.

The square root of 28394146 is about 5328.6157677205. The cubic root of 28394146 is about 305.0770959813.

The spelling of 28394146 in words is "twenty-eight million, three hundred ninety-four thousand, one hundred forty-six".