28830620 has 144 divisors (see below), whose sum is σ = 79365888. Its totient is φ = 8709120.

The previous prime is 28830601. The next prime is 28830643. The reversal of 28830620 is 2603882.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 394904 + ... + 394976.

It is an arithmetic number, because the mean of its divisors is an integer number (551152).

Almost surely, 2^28830620 is an apocalyptic number.

28830620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28830620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39682944).

28830620 is an abundant number, since it is smaller than the sum of its proper divisors (50535268).

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

28830620 is a wasteful number, since it uses less digits than its factorization.

28830620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28830620 is about 5369.4152381800. The cubic root of 28830620 is about 306.6323659389.

The spelling of 28830620 in words is "twenty-eight million, eight hundred thirty thousand, six hundred twenty".