30085639 has 4 divisors (see below), whose sum is σ = 30252040. Its totient is φ = 29919240.

The previous prime is 30085637. The next prime is 30085651. The reversal of 30085639 is 93658003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93658003 = 103 ⋅909301.

It is a cyclic number.

It is not a de Polignac number, because 30085639 - 2¹ = 30085637 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 (30085637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82929 + ... + 83290.

It is an arithmetic number, because the mean of its divisors is an integer number (7563010).

Almost surely, 2^30085639 is an apocalyptic number.

30085639 is a deficient number, since it is larger than the sum of its proper divisors (166401).

30085639 is a wasteful number, since it uses less digits than its factorization.

30085639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166400.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 30085639 is about 5485.0377391591. The cubic root of 30085639 is about 311.0186366833.

The spelling of 30085639 in words is "thirty million, eighty-five thousand, six hundred thirty-nine".