30381940388 has 24 divisors (see below), whose sum is σ = 57817465272. Its totient is φ = 13910966784.

The previous prime is 30381940387. The next prime is 30381940409. The reversal of 30381940388 is 88304918303.

It can be written as a sum of positive squares in 4 ways, for example, as 9309934144 + 21072006244 = 96488^2 + 145162^2 .

It is not an unprimeable number, because it can be changed into a prime (30381940387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6035231 + ... + 6040262.

It is an arithmetic number, because the mean of its divisors is an integer number (2409061053).

Almost surely, 2^30381940388 is an apocalyptic number.

It is an amenable number.

30381940388 is a deficient number, since it is larger than the sum of its proper divisors (27435524884).

30381940388 is a wasteful number, since it uses less digits than its factorization.

30381940388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12075551 (or 12075549 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 30381940388 in words is "thirty billion, three hundred eighty-one million, nine hundred forty thousand, three hundred eighty-eight".