28794138 has 8 divisors (see below), whose sum is σ = 57588288. Its totient is φ = 9598044.

The previous prime is 28794131. The next prime is 28794149. The reversal of 28794138 is 83149782.

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

28794138 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 28794138.

It is not an unprimeable number, because it can be changed into a prime (28794131) 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, 2399506 + ... + 2399517.

It is an arithmetic number, because the mean of its divisors is an integer number (7198536).

Almost surely, 2^28794138 is an apocalyptic number.

28794138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28794138 is a wasteful number, since it uses less digits than its factorization.

28794138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4799028.

The product of its digits is 96768, while the sum is 42.

The square root of 28794138 is about 5366.0169586016. The cubic root of 28794138 is about 306.5029747597.

The spelling of 28794138 in words is "twenty-eight million, seven hundred ninety-four thousand, one hundred thirty-eight".