28030332 has 48 divisors (see below), whose sum is σ = 71938944. Its totient is φ = 8424000.

The previous prime is 28030319. The next prime is 28030333. The reversal of 28030332 is 23303082.

It is a super-3 number, since 3×28030332³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28030299 and 28030308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28030333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16482 + ... + 18102.

It is an arithmetic number, because the mean of its divisors is an integer number (1498728).

Almost surely, 2^28030332 is an apocalyptic number.

28030332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28030332 is the 4323-rd pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28030332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35969472).

28030332 is an abundant number, since it is smaller than the sum of its proper divisors (43908612).

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

28030332 is a wasteful number, since it uses less digits than its factorization.

28030332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770 (or 1768 counting only the distinct ones).

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

The square root of 28030332 is about 5294.3679509456. The cubic root of 28030332 is about 303.7685073991.

The spelling of 28030332 in words is "twenty-eight million, thirty thousand, three hundred thirty-two".