28710330 has 96 divisors (see below), whose sum is σ = 79662528. Its totient is φ = 6566400.

The previous prime is 28710313. The next prime is 28710337. The reversal of 28710330 is 3301782.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28710330.

It is not an unprimeable number, because it can be changed into a prime (28710337) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119010 + ... + 119250.

It is an arithmetic number, because the mean of its divisors is an integer number (829818).

Almost surely, 2^28710330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28710330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39831264).

28710330 is an abundant number, since it is smaller than the sum of its proper divisors (50952198).

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

28710330 is a wasteful number, since it uses less digits than its factorization.

28710330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 28710330 is about 5358.2021238471. The cubic root of 28710330 is about 306.2053173738.

The spelling of 28710330 in words is "twenty-eight million, seven hundred ten thousand, three hundred thirty".