28319130 has 96 divisors (see below), whose sum is σ = 85363200. Its totient is φ = 6379776.

The previous prime is 28319117. The next prime is 28319147. The reversal of 28319130 is 3191382.

It is a junction number, because it is equal to n+sod(n) for n = 28319094 and 28319103.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49486 + ... + 50054.

It is an arithmetic number, because the mean of its divisors is an integer number (889200).

Almost surely, 2^28319130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28319130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42681600).

28319130 is an abundant number, since it is smaller than the sum of its proper divisors (57044070).

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

28319130 is a wasteful number, since it uses less digits than its factorization.

28319130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 28319130 is about 5321.5721361267. The cubic root of 28319130 is about 304.8081925795.

The spelling of 28319130 in words is "twenty-eight million, three hundred nineteen thousand, one hundred thirty".