30981132 has 144 divisors (see below), whose sum is σ = 98862400. Its totient is φ = 8128512.

The previous prime is 30981109. The next prime is 30981133. The reversal of 30981132 is 23118903.

It is a junction number, because it is equal to n+sod(n) for n = 30981096 and 30981105.

It is not an unprimeable number, because it can be changed into a prime (30981133) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 160428 + ... + 160620.

Almost surely, 2^30981132 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 30981132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49431200).

30981132 is an abundant number, since it is smaller than the sum of its proper divisors (67881268).

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

30981132 is a wasteful number, since it uses less digits than its factorization.

30981132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 30981132 is about 5566.0697085107. The cubic root of 30981132 is about 314.0743194334.

It can be divided in two parts, 30981 and 132, that added together give a palindrome (31113).

The spelling of 30981132 in words is "thirty million, nine hundred eighty-one thousand, one hundred thirty-two".