305699680 has 192 divisors, whose sum is σ = 877879296. Its totient is φ = 99072000.

The previous prime is 305699617. The next prime is 305699689. The reversal of 305699680 is 86996503.

It is a self number, because there is not a number n which added to its sum of digits gives 305699680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305699689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 709065 + ... + 709495.

It is an arithmetic number, because the mean of its divisors is an integer number (4572288).

Almost surely, 2^305699680 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 305699680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (438939648).

305699680 is an abundant number, since it is smaller than the sum of its proper divisors (572179616).

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

305699680 is a wasteful number, since it uses less digits than its factorization.

305699680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 305699680 is about 17484.2695014690. The cubic root of 305699680 is about 673.6458852409.

The spelling of 305699680 in words is "three hundred five million, six hundred ninety-nine thousand, six hundred eighty".