28319838 has 8 divisors (see below), whose sum is σ = 56639688. Its totient is φ = 9439944.

The previous prime is 28319821. The next prime is 28319867. The reversal of 28319838 is 83891382.

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

28319838 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 28319838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2359981 + ... + 2359992.

It is an arithmetic number, because the mean of its divisors is an integer number (7079961).

Almost surely, 2^28319838 is an apocalyptic number.

28319838 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.

28319838 is a wasteful number, since it uses less digits than its factorization.

28319838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4719978.

The product of its digits is 82944, while the sum is 42.

The square root of 28319838 is about 5321.6386574062. The cubic root of 28319838 is about 304.8107327046.

The spelling of 28319838 in words is "twenty-eight million, three hundred nineteen thousand, eight hundred thirty-eight".