30138647 has 16 divisors (see below), whose sum is σ = 37746432. Its totient is φ = 23377920.

The previous prime is 30138629. The next prime is 30138659. The reversal of 30138647 is 74683103.

It is a cyclic number.

It is not a de Polignac number, because 30138647 - 2¹⁰ = 30137623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30138547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19028 + ... + 20550.

It is an arithmetic number, because the mean of its divisors is an integer number (2359152).

Almost surely, 2^30138647 is an apocalyptic number.

30138647 is a deficient number, since it is larger than the sum of its proper divisors (7607785).

30138647 is a wasteful number, since it uses less digits than its factorization.

30138647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1798.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 30138647 is about 5489.8676668933. The cubic root of 30138647 is about 311.2011911443.

The spelling of 30138647 in words is "thirty million, one hundred thirty-eight thousand, six hundred forty-seven".