30138956 has 12 divisors (see below), whose sum is σ = 52827600. Its totient is φ = 15045360.

The previous prime is 30138949. The next prime is 30138961. The reversal of 30138956 is 65983103.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3056 + ... + 8343.

It is an arithmetic number, because the mean of its divisors is an integer number (4402300).

Almost surely, 2^30138956 is an apocalyptic number.

It is an amenable number.

30138956 is a deficient number, since it is larger than the sum of its proper divisors (22688644).

30138956 is a wasteful number, since it uses less digits than its factorization.

30138956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12064 (or 12062 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 30138956 is about 5489.8958095760. The cubic root of 30138956 is about 311.2022546828.

The spelling of 30138956 in words is "thirty million, one hundred thirty-eight thousand, nine hundred fifty-six".