204304340 has 36 divisors (see below), whose sum is σ = 452824596. Its totient is φ = 77417856.

The previous prime is 204304319. The next prime is 204304357. The reversal of 204304340 is 43403402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43217476 + 161086864 = 6574^2 + 12692^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6929 + ... + 21368.

It is an arithmetic number, because the mean of its divisors is an integer number (12578461).

Almost surely, 2^204304340 is an apocalyptic number.

204304340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204304340 is an abundant number, since it is smaller than the sum of its proper divisors (248520256).

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

204304340 is a wasteful number, since it uses less digits than its factorization.

204304340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28344 (or 28323 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 204304340 is about 14293.5069174783. The cubic root of 204304340 is about 588.9691277610.

Adding to 204304340 its reverse (43403402), we get a palindrome (247707742).

It can be divided in two parts, 2043043 and 40, that multiplied together give a triangular number (81721720 = T₁₂₇₈₄).

The spelling of 204304340 in words is "two hundred four million, three hundred four thousand, three hundred forty".