28504394 has 8 divisors (see below), whose sum is σ = 42895008. Its totient is φ = 14206060.

The previous prime is 28504391. The next prime is 28504403. The reversal of 28504394 is 49340582.

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 (28504391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22292 + ... + 23535.

It is an arithmetic number, because the mean of its divisors is an integer number (5361876).

Almost surely, 2^28504394 is an apocalyptic number.

28504394 is a deficient number, since it is larger than the sum of its proper divisors (14390614).

28504394 is a wasteful number, since it uses less digits than its factorization.

28504394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46140.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 28504394 is about 5338.9506459603. The cubic root of 28504394 is about 305.4714343319.

The spelling of 28504394 in words is "twenty-eight million, five hundred four thousand, three hundred ninety-four".