30871242 has 24 divisors (see below), whose sum is σ = 67001220. Its totient is φ = 10272960.

The previous prime is 30871229. The next prime is 30871249. The reversal of 30871242 is 24217803.

It can be written as a sum of positive squares in 2 ways, for example, as 30569841 + 301401 = 5529^2 + 549^2 .

It is not an unprimeable number, because it can be changed into a prime (30871249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13734 + ... + 15822.

Almost surely, 2^30871242 is an apocalyptic number.

30871242 is an abundant number, since it is smaller than the sum of its proper divisors (36129978).

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

30871242 is a wasteful number, since it uses less digits than its factorization.

30871242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918 (or 2915 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 30871242 is about 5556.1895216056. The cubic root of 30871242 is about 313.7025392356.

It can be divided in two parts, 30871 and 242, that added together give a palindrome (31113).

The spelling of 30871242 in words is "thirty million, eight hundred seventy-one thousand, two hundred forty-two".