28318842 has 48 divisors (see below), whose sum is σ = 66104640. Its totient is φ = 8969400.

The previous prime is 28318813. The next prime is 28318861. The reversal of 28318842 is 24881382.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28318797 and 28318806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187467 + ... + 187617.

It is an arithmetic number, because the mean of its divisors is an integer number (1377180).

Almost surely, 2^28318842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28318842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33052320).

28318842 is an abundant number, since it is smaller than the sum of its proper divisors (37785798).

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

28318842 is a wasteful number, since it uses less digits than its factorization.

28318842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 179 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 28318842 is about 5321.5450763852. The cubic root of 28318842 is about 304.8071592962.

The spelling of 28318842 in words is "twenty-eight million, three hundred eighteen thousand, eight hundred forty-two".