30942128 has 60 divisors (see below), whose sum is σ = 70990992. Its totient is φ = 13023360.

The previous prime is 30942113. The next prime is 30942133. The reversal of 30942128 is 82124903.

It is a self number, because there is not a number n which added to its sum of digits gives 30942128.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 47501 + ... + 48147.

Almost surely, 2^30942128 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 30942128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35495496).

30942128 is an abundant number, since it is smaller than the sum of its proper divisors (40048864).

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

30942128 is a wasteful number, since it uses less digits than its factorization.

30942128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 30942128 is about 5562.5648760262. The cubic root of 30942128 is about 313.9424617684.

The spelling of 30942128 in words is "thirty million, nine hundred forty-two thousand, one hundred twenty-eight".