30047028 has 24 divisors (see below), whose sum is σ = 76483680. Its totient is φ = 9105120.

The previous prime is 30047027. The next prime is 30047047. The reversal of 30047028 is 82074003.

It is a junction number, because it is equal to n+sod(n) for n = 30046989 and 30047007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30047027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113683 + ... + 113946.

It is an arithmetic number, because the mean of its divisors is an integer number (3186820).

Almost surely, 2^30047028 is an apocalyptic number.

It is an amenable number.

30047028 is an abundant number, since it is smaller than the sum of its proper divisors (46436652).

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

30047028 is a wasteful number, since it uses less digits than its factorization.

30047028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227647 (or 227645 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 30047028 is about 5481.5169433287. The cubic root of 30047028 is about 310.8855290849.

The spelling of 30047028 in words is "thirty million, forty-seven thousand, twenty-eight".