204860640 has 96 divisors (see below), whose sum is σ = 667608480. Its totient is φ = 52742144.

The previous prime is 204860629. The next prime is 204860647. The reversal of 204860640 is 46068402.

204860640 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 (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 204860598 and 204860607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204860647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6562 + ... + 21278.

It is an arithmetic number, because the mean of its divisors is an integer number (6954255).

Almost surely, 2^204860640 is an apocalyptic number.

204860640 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 204860640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333804240).

204860640 is an abundant number, since it is smaller than the sum of its proper divisors (462747840).

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

204860640 is a wasteful number, since it uses less digits than its factorization.

204860640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14764 (or 14756 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 204860640 is about 14312.9535735990. The cubic root of 204860640 is about 589.5032110389.

The spelling of 204860640 in words is "two hundred four million, eight hundred sixty thousand, six hundred forty".