28138674 has 8 divisors (see below), whose sum is σ = 56277360. Its totient is φ = 9379556.

The previous prime is 28138667. The next prime is 28138679. The reversal of 28138674 is 47683182.

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

28138674 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28138679) 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, 2344884 + ... + 2344895.

It is an arithmetic number, because the mean of its divisors is an integer number (7034670).

Almost surely, 2^28138674 is an apocalyptic number.

28138674 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.

28138674 is a wasteful number, since it uses less digits than its factorization.

28138674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4689784.

The product of its digits is 64512, while the sum is 39.

The square root of 28138674 is about 5304.5898993230. The cubic root of 28138674 is about 304.1593765522.

The spelling of 28138674 in words is "twenty-eight million, one hundred thirty-eight thousand, six hundred seventy-four".