30321140 has 48 divisors (see below), whose sum is σ = 66044160. Its totient is φ = 11685120.

The previous prime is 30321127. The next prime is 30321163. The reversal of 30321140 is 4112303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84281 + ... + 84639.

It is an arithmetic number, because the mean of its divisors is an integer number (1375920).

Almost surely, 2^30321140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30321140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33022080).

30321140 is an abundant number, since it is smaller than the sum of its proper divisors (35723020).

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

30321140 is a wasteful number, since it uses less digits than its factorization.

30321140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 30321140 is about 5506.4634748630. The cubic root of 30321140 is about 311.8280473705.

Adding to 30321140 its reverse (4112303), we get a palindrome (34433443).

The spelling of 30321140 in words is "thirty million, three hundred twenty-one thousand, one hundred forty".