30207128 has 48 divisors (see below), whose sum is σ = 66361680. Its totient is φ = 12852672.

The previous prime is 30207109. The next prime is 30207143. The reversal of 30207128 is 82170203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102950 + ... + 103242.

It is an arithmetic number, because the mean of its divisors is an integer number (1382535).

Almost surely, 2^30207128 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 30207128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33180840).

30207128 is an abundant number, since it is smaller than the sum of its proper divisors (36154552).

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

30207128 is a wasteful number, since it uses less digits than its factorization.

30207128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 30207128 is about 5496.1011635522. The cubic root of 30207128 is about 311.4367165136.

The spelling of 30207128 in words is "thirty million, two hundred seven thousand, one hundred twenty-eight".