204371840 has 64 divisors (see below), whose sum is σ = 504385920. Its totient is φ = 79104000.

The previous prime is 204371837. The next prime is 204371863. The reversal of 204371840 is 48173402.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14690 + ... + 24990.

It is an arithmetic number, because the mean of its divisors is an integer number (7881030).

Almost surely, 2^204371840 is an apocalyptic number.

204371840 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 204371840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252192960).

204371840 is an abundant number, since it is smaller than the sum of its proper divisors (300014080).

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

204371840 is a wasteful number, since it uses less digits than its factorization.

204371840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10351 (or 10339 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 204371840 is about 14295.8679344767. The cubic root of 204371840 is about 589.0339836824.

The spelling of 204371840 in words is "two hundred four million, three hundred seventy-one thousand, eight hundred forty".