204397920 has 144 divisors (see below), whose sum is σ = 713945232. Its totient is φ = 53222400.

The previous prime is 204397873. The next prime is 204397931. The reversal of 204397920 is 29793402.

204397920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60270 + ... + 63570.

It is an arithmetic number, because the mean of its divisors is an integer number (4957953).

Almost surely, 2^204397920 is an apocalyptic number.

204397920 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 204397920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356972616).

204397920 is an abundant number, since it is smaller than the sum of its proper divisors (509547312).

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

204397920 is a wasteful number, since it uses less digits than its factorization.

204397920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3365 (or 3354 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 204397920 is about 14296.7800570618. The cubic root of 204397920 is about 589.0590382641.

The spelling of 204397920 in words is "two hundred four million, three hundred ninety-seven thousand, nine hundred twenty".