30578028 has 48 divisors (see below), whose sum is σ = 79328256. Its totient is φ = 9103680.

The previous prime is 30578003. The next prime is 30578029. The reversal of 30578028 is 82087503.

It is a self number, because there is not a number n which added to its sum of digits gives 30578028.

It is not an unprimeable number, because it can be changed into a prime (30578029) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1675 + ... + 7997.

It is an arithmetic number, because the mean of its divisors is an integer number (1652672).

Almost surely, 2^30578028 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 30578028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39664128).

30578028 is an abundant number, since it is smaller than the sum of its proper divisors (48750228).

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

30578028 is a wasteful number, since it uses less digits than its factorization.

30578028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6374 (or 6372 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 30578028 is about 5529.7403194002. The cubic root of 30578028 is about 312.7061994851.

The spelling of 30578028 in words is "thirty million, five hundred seventy-eight thousand, twenty-eight".