30138712 has 16 divisors (see below), whose sum is σ = 59484600. Its totient is φ = 14276160.

The previous prime is 30138709. The next prime is 30138791. The reversal of 30138712 is 21783103.

It is a super-2 number, since 2×30138712² = 1816683922037888, which contains 22 as substring.

It is a congruent number.

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, 98989 + ... + 99292.

Almost surely, 2^30138712 is an apocalyptic number.

It is an amenable number.

30138712 is a deficient number, since it is larger than the sum of its proper divisors (29345888).

30138712 is a wasteful number, since it uses less digits than its factorization.

30138712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198306 (or 198302 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 30138712 is about 5489.8735868870. The cubic root of 30138712 is about 311.2014148666.

The spelling of 30138712 in words is "thirty million, one hundred thirty-eight thousand, seven hundred twelve".