30381552 has 90 divisors (see below), whose sum is σ = 88150608. Its totient is φ = 9763776.

The previous prime is 30381523. The next prime is 30381553. The reversal of 30381552 is 25518303.

30381552 is a `hidden beast` number, since 30 + 3 + 81 + 552 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30381553) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 453423 + ... + 453489.

Almost surely, 2^30381552 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 30381552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44075304).

30381552 is an abundant number, since it is smaller than the sum of its proper divisors (57769056).

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

30381552 is a wasteful number, since it uses less digits than its factorization.

30381552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 30381552 is about 5511.9462987224. The cubic root of 30381552 is about 312.0350059342.

Adding to 30381552 its reverse (25518303), we get a palindrome (55899855).

The spelling of 30381552 in words is "thirty million, three hundred eighty-one thousand, five hundred fifty-two".