306172120 has 32 divisors (see below), whose sum is σ = 711112320. Its totient is φ = 118517760.

The previous prime is 306172109. The next prime is 306172123. The reversal of 306172120 is 21271603.

It is a junction number, because it is equal to n+sod(n) for n = 306172091 and 306172100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306172123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122217 + ... + 124696.

It is an arithmetic number, because the mean of its divisors is an integer number (22222260).

Almost surely, 2^306172120 is an apocalyptic number.

It is an amenable number.

306172120 is an abundant number, since it is smaller than the sum of its proper divisors (404940200).

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

306172120 is a wasteful number, since it uses less digits than its factorization.

306172120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246955 (or 246951 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 306172120 is about 17497.7747156603. The cubic root of 306172120 is about 673.9927326803.

The spelling of 306172120 in words is "three hundred six million, one hundred seventy-two thousand, one hundred twenty".