204684740 has 48 divisors (see below), whose sum is σ = 475435632. Its totient is φ = 73529856.

The previous prime is 204684737. The next prime is 204684763. The reversal of 204684740 is 47486402.

204684740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 20214016 + 184470724 = 4496^2 + 13582^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 204684740.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1019 + ... + 20258.

It is an arithmetic number, because the mean of its divisors is an integer number (9904909).

Almost surely, 2^204684740 is an apocalyptic number.

204684740 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 204684740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237717816).

204684740 is an abundant number, since it is smaller than the sum of its proper divisors (270750892).

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

204684740 is a wasteful number, since it uses less digits than its factorization.

204684740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21336 (or 21334 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 204684740 is about 14306.8074705715. The cubic root of 204684740 is about 589.3344405238.

The spelling of 204684740 in words is "two hundred four million, six hundred eighty-four thousand, seven hundred forty".