30128830 has 8 divisors (see below), whose sum is σ = 54231912. Its totient is φ = 12051528.

The previous prime is 30128803. The next prime is 30128837. The reversal of 30128830 is 3882103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 30128795 and 30128804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30128837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1506432 + ... + 1506451.

It is an arithmetic number, because the mean of its divisors is an integer number (6778989).

Almost surely, 2^30128830 is an apocalyptic number.

30128830 is a deficient number, since it is larger than the sum of its proper divisors (24103082).

30128830 is a wasteful number, since it uses less digits than its factorization.

30128830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3012890.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 30128830 is about 5488.9734923754. The cubic root of 30128830 is about 311.1673984986.

The spelling of 30128830 in words is "thirty million, one hundred twenty-eight thousand, eight hundred thirty".