30871938 has 8 divisors (see below), whose sum is σ = 61743888. Its totient is φ = 10290644.

The previous prime is 30871937. The next prime is 30871993. The reversal of 30871938 is 83917803.

It is a sphenic number, since it is the product of 3 distinct primes.

30871938 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 30871896 and 30871905.

It is not an unprimeable number, because it can be changed into a prime (30871931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2572656 + ... + 2572667.

It is an arithmetic number, because the mean of its divisors is an integer number (7717986).

Almost surely, 2^30871938 is an apocalyptic number.

30871938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

30871938 is a wasteful number, since it uses less digits than its factorization.

30871938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5145328.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 30871938 is about 5556.2521541053. The cubic root of 30871938 is about 313.7048967191.

The spelling of 30871938 in words is "thirty million, eight hundred seventy-one thousand, nine hundred thirty-eight".