30138038 has 16 divisors (see below), whose sum is σ = 52720800. Its totient is φ = 12916008.

The previous prime is 30138037. The next prime is 30138041. The reversal of 30138038 is 83083103.

It is a junction number, because it is equal to n+sod(n) for n = 30137998 and 30138016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30138037) 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 7 ways as a sum of consecutive naturals, for example, 21281 + ... + 22652.

It is an arithmetic number, because the mean of its divisors is an integer number (3295050).

Almost surely, 2^30138038 is an apocalyptic number.

30138038 is a deficient number, since it is larger than the sum of its proper divisors (22582762).

30138038 is an equidigital number, since it uses as much as digits as its factorization.

30138038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43956 (or 43942 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 30138038 is about 5489.8122007952. The cubic root of 30138038 is about 311.1990950227.

The spelling of 30138038 in words is "thirty million, one hundred thirty-eight thousand, thirty-eight".