30381372 has 72 divisors (see below), whose sum is σ = 91642320. Its totient is φ = 8678880.

The previous prime is 30381371. The next prime is 30381419. The reversal of 30381372 is 27318303.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30381371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2422 + ... + 8162.

It is an arithmetic number, because the mean of its divisors is an integer number (1272810).

Almost surely, 2^30381372 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 30381372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45821160).

30381372 is an abundant number, since it is smaller than the sum of its proper divisors (61260948).

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

30381372 is a wasteful number, since it uses less digits than its factorization.

30381372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5768 (or 5753 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 30381372 is about 5511.9299705276. The cubic root of 30381372 is about 312.0343897004.

Adding to 30381372 its reverse (27318303), we get a palindrome (57699675).

The spelling of 30381372 in words is "thirty million, three hundred eighty-one thousand, three hundred seventy-two".