30839865820 has 24 divisors (see below), whose sum is σ = 64786042944. Its totient is φ = 12331694016.

The previous prime is 30839865743. The next prime is 30839865829. The reversal of 30839865820 is 2856893803.

It is a happy number.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30839865829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205972 + ... + 322651.

It is an arithmetic number, because the mean of its divisors is an integer number (2699418456).

Almost surely, 2^30839865820 is an apocalyptic number.

It is an amenable number.

30839865820 is an abundant number, since it is smaller than the sum of its proper divisors (33946177124).

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

30839865820 is a wasteful number, since it uses less digits than its factorization.

30839865820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531549 (or 531547 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 30839865820 in words is "thirty billion, eight hundred thirty-nine million, eight hundred sixty-five thousand, eight hundred twenty".