305172736 has 72 divisors (see below), whose sum is σ = 668584224. Its totient is φ = 137871360.

The previous prime is 305172719. The next prime is 305172761. The reversal of 305172736 is 637271503.

305172736 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864336 + ... + 864688.

It is an arithmetic number, because the mean of its divisors is an integer number (9285892).

Almost surely, 2^305172736 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 305172736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334292112).

305172736 is an abundant number, since it is smaller than the sum of its proper divisors (363411488).

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

305172736 is a wasteful number, since it uses less digits than its factorization.

305172736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 34.

The square root of 305172736 is about 17469.1939138588. The cubic root of 305172736 is about 673.2586012104.

The spelling of 305172736 in words is "three hundred five million, one hundred seventy-two thousand, seven hundred thirty-six".