304285727640 has 128 divisors (see below), whose sum is σ = 924041131200. Its totient is φ = 80150568960.

The previous prime is 304285727593. The next prime is 304285727651. The reversal of 304285727640 is 46727582403.

It is a Cunningham number, because it is equal to 551621²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 304285727640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11018650 + ... + 11046230.

Almost surely, 2^304285727640 is an apocalyptic number.

304285727640 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 304285727640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462020565600).

304285727640 is an abundant number, since it is smaller than the sum of its proper divisors (619755403560).

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

304285727640 is a wasteful number, since it uses less digits than its factorization.

304285727640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28717 (or 28713 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 48.

The spelling of 304285727640 in words is "three hundred four billion, two hundred eighty-five million, seven hundred twenty-seven thousand, six hundred forty".