204313640 has 32 divisors (see below), whose sum is σ = 470400480. Its totient is φ = 79824192.

The previous prime is 204313639. The next prime is 204313649. The reversal of 204313640 is 46313402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (204313649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57674 + ... + 61113.

It is an arithmetic number, because the mean of its divisors is an integer number (14700015).

Almost surely, 2^204313640 is an apocalyptic number.

204313640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204313640 is an abundant number, since it is smaller than the sum of its proper divisors (266086840).

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

204313640 is a wasteful number, since it uses less digits than its factorization.

204313640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118841 (or 118837 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 204313640 is about 14293.8322363179. The cubic root of 204313640 is about 588.9780643141.

The spelling of 204313640 in words is "two hundred four million, three hundred thirteen thousand, six hundred forty".