204393284940 has 96 divisors (see below), whose sum is σ = 617862280896. Its totient is φ = 50186649600.

The previous prime is 204393284939. The next prime is 204393284957. The reversal of 204393284940 is 49482393402.

It is a super-3 number, since 3×204393284940³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 204393284940.

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, 13957 + ... + 639516.

It is an arithmetic number, because the mean of its divisors is an integer number (6436065426).

Almost surely, 2^204393284940 is an apocalyptic number.

204393284940 is a gapful number since it is divisible by the number (20) 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 204393284940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308931140448).

204393284940 is an abundant number, since it is smaller than the sum of its proper divisors (413468995956).

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

204393284940 is a wasteful number, since it uses less digits than its factorization.

204393284940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653899 (or 653897 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 48.

The spelling of 204393284940 in words is "two hundred four billion, three hundred ninety-three million, two hundred eighty-four thousand, nine hundred forty".