204344640 has 224 divisors, whose sum is σ = 733714560. Its totient is φ = 53526528.

The previous prime is 204344629. The next prime is 204344663. The reversal of 204344640 is 46443402.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 578704 + ... + 579056.

Almost surely, 2^204344640 is an apocalyptic number.

204344640 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 204344640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366857280).

204344640 is an abundant number, since it is smaller than the sum of its proper divisors (529369920).

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

204344640 is a wasteful number, since it uses less digits than its factorization.

204344640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 204344640 is about 14294.9165789801. The cubic root of 204344640 is about 589.0078508662.

The spelling of 204344640 in words is "two hundred four million, three hundred forty-four thousand, six hundred forty".