305047680 has 128 divisors (see below), whose sum is σ = 1111294080. Its totient is φ = 69722112.

The previous prime is 305047663. The next prime is 305047693. The reversal of 305047680 is 86740503.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2092 + ... + 24788.

It is an arithmetic number, because the mean of its divisors is an integer number (8681985).

Almost surely, 2^305047680 is an apocalyptic number.

305047680 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 305047680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (555647040).

305047680 is an abundant number, since it is smaller than the sum of its proper divisors (806246400).

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

305047680 is a wasteful number, since it uses less digits than its factorization.

305047680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22726 (or 22714 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 305047680 is about 17465.6142176564. The cubic root of 305047680 is about 673.1666243058.

The spelling of 305047680 in words is "three hundred five million, forty-seven thousand, six hundred eighty".