204861440 has 104 divisors (see below), whose sum is σ = 562230240. Its totient is φ = 70189056.

The previous prime is 204861421. The next prime is 204861463. The reversal of 204861440 is 44168402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142646 + ... + 144074.

It is an arithmetic number, because the mean of its divisors is an integer number (5406060).

Almost surely, 2^204861440 is an apocalyptic number.

204861440 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 204861440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281115120).

204861440 is an abundant number, since it is smaller than the sum of its proper divisors (357368800).

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

204861440 is an equidigital number, since it uses as much as digits as its factorization.

204861440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465 (or 1443 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 204861440 is about 14312.9815202843. The cubic root of 204861440 is about 589.5039783930.

The spelling of 204861440 in words is "two hundred four million, eight hundred sixty-one thousand, four hundred forty".