30320378172 has 108 divisors (see below), whose sum is σ = 89436874800. Its totient is φ = 8657436816.

The previous prime is 30320378147. The next prime is 30320378177. The reversal of 30320378172 is 27187302303.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

30320378172 is a `hidden beast` number, since 303 + 203 + 7 + 81 + 72 = 666.

It is a super-3 number, since 3×30320378172³ (a number of 32 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30320378177) 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 35 ways as a sum of consecutive naturals, for example, 19348533 + ... + 19350099.

Almost surely, 2^30320378172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30320378172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44718437400).

30320378172 is an abundant number, since it is smaller than the sum of its proper divisors (59116496628).

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

30320378172 is an equidigital number, since it uses as much as digits as its factorization.

30320378172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165 (or 1579 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The spelling of 30320378172 in words is "thirty billion, three hundred twenty million, three hundred seventy-eight thousand, one hundred seventy-two".