28332030 has 64 divisors (see below), whose sum is σ = 73078848. Its totient is φ = 7004160.

The previous prime is 28332001. The next prime is 28332061. The reversal of 28332030 is 3023382.

It is a junction number, because it is equal to n+sod(n) for n = 28331988 and 28332006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36850 + ... + 37610.

It is an arithmetic number, because the mean of its divisors is an integer number (1141857).

Almost surely, 2^28332030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28332030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36539424).

28332030 is an abundant number, since it is smaller than the sum of its proper divisors (44746818).

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

28332030 is a wasteful number, since it uses less digits than its factorization.

28332030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 28332030 is about 5322.7840459669. The cubic root of 28332030 is about 304.8544678805.

The spelling of 28332030 in words is "twenty-eight million, three hundred thirty-two thousand, thirty".