30380320872 has 72 divisors (see below), whose sum is σ = 90440065170. Its totient is φ = 9206155200.

The previous prime is 30380320823. The next prime is 30380320897. The reversal of 30380320872 is 27802308303.

30380320872 is a `hidden beast` number, since 3 + 0 + 380 + 3 + 208 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29197923876 + 1182396996 = 170874^2 + 34386^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 1734879 + ... + 1752302.

Almost surely, 2^30380320872 is an apocalyptic number.

It is an amenable number.

30380320872 is an abundant number, since it is smaller than the sum of its proper divisors (60059744298).

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

30380320872 is a wasteful number, since it uses less digits than its factorization.

30380320872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3487215 (or 3487197 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 30380320872 in words is "thirty billion, three hundred eighty million, three hundred twenty thousand, eight hundred seventy-two".