30128312 has 16 divisors (see below), whose sum is σ = 56643840. Its totient is φ = 15023296.

The previous prime is 30128299. The next prime is 30128339. The reversal of 30128312 is 21382103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1853 + ... + 7980.

It is an arithmetic number, because the mean of its divisors is an integer number (3540240).

Almost surely, 2^30128312 is an apocalyptic number.

It is an amenable number.

30128312 is a deficient number, since it is larger than the sum of its proper divisors (26515528).

30128312 is a wasteful number, since it uses less digits than its factorization.

30128312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10222 (or 10218 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 30128312 is about 5488.9263066651. The cubic root of 30128312 is about 311.1656152051.

The spelling of 30128312 in words is "thirty million, one hundred twenty-eight thousand, three hundred twelve".