30748028 has 18 divisors (see below), whose sum is σ = 54391176. Its totient is φ = 15209424.

The previous prime is 30748021. The next prime is 30748031. The reversal of 30748028 is 82084703.

It is a junction number, because it is equal to n+sod(n) for n = 30747985 and 30748003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30748021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47201 + ... + 47847.

It is an arithmetic number, because the mean of its divisors is an integer number (3021732).

Almost surely, 2^30748028 is an apocalyptic number.

It is an amenable number.

30748028 is a deficient number, since it is larger than the sum of its proper divisors (23643148).

30748028 is a wasteful number, since it uses less digits than its factorization.

30748028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 758 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 30748028 is about 5545.0904411019. The cubic root of 30748028 is about 313.2846305270.

The spelling of 30748028 in words is "thirty million, seven hundred forty-eight thousand, twenty-eight".