30516138 has 12 divisors (see below), whose sum is σ = 66118338. Its totient is φ = 10172040.

The previous prime is 30516133. The next prime is 30516151. The reversal of 30516138 is 83161503.

It can be written as a sum of positive squares in only one way, i.e., 24770529 + 5745609 = 4977^2 + 2397^2 .

It is not an unprimeable number, because it can be changed into a prime (30516131) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 847653 + ... + 847688.

Almost surely, 2^30516138 is an apocalyptic number.

30516138 is an abundant number, since it is smaller than the sum of its proper divisors (35602200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30516138 is a wasteful number, since it uses less digits than its factorization.

30516138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695349 (or 1695346 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 30516138 is about 5524.1413812465. The cubic root of 30516138 is about 312.4950842960.

The spelling of 30516138 in words is "thirty million, five hundred sixteen thousand, one hundred thirty-eight".