30139272 has 24 divisors (see below), whose sum is σ = 81627390. Its totient is φ = 10046400.

The previous prime is 30139271. The next prime is 30139279. The reversal of 30139272 is 27293103.

It can be written as a sum of positive squares in only one way, i.e., 20738916 + 9400356 = 4554^2 + 3066^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×30139272³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (30139271) 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, 209229 + ... + 209372.

Almost surely, 2^30139272 is an apocalyptic number.

It is an amenable number.

30139272 is an abundant number, since it is smaller than the sum of its proper divisors (51488118).

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

30139272 is a wasteful number, since it uses less digits than its factorization.

30139272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418613 (or 418606 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 30139272 is about 5489.9245896460. The cubic root of 30139272 is about 311.2033423070.

The spelling of 30139272 in words is "thirty million, one hundred thirty-nine thousand, two hundred seventy-two".