30843428 has 48 divisors (see below), whose sum is σ = 67737600. Its totient is φ = 11938080.

The previous prime is 30843409. The next prime is 30843431. The reversal of 30843428 is 82434803.

It is a junction number, because it is equal to n+sod(n) for n = 30843394 and 30843403.

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 15 ways as a sum of consecutive naturals, for example, 73403 + ... + 73821.

It is an arithmetic number, because the mean of its divisors is an integer number (1411200).

Almost surely, 2^30843428 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 30843428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33868800).

30843428 is an abundant number, since it is smaller than the sum of its proper divisors (36894172).

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

30843428 is a wasteful number, since it uses less digits than its factorization.

30843428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 30843428 is about 5553.6859832007. The cubic root of 30843428 is about 313.6082989483.

The spelling of 30843428 in words is "thirty million, eight hundred forty-three thousand, four hundred twenty-eight".