204132640 has 24 divisors (see below), whose sum is σ = 482263740. Its totient is φ = 81652992.

The previous prime is 204132623. The next prime is 204132671. The reversal of 204132640 is 46231402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 202663696 + 1468944 = 14236^2 + 1212^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637755 + ... + 638074.

Almost surely, 2^204132640 is an apocalyptic number.

204132640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204132640 is an abundant number, since it is smaller than the sum of its proper divisors (278131100).

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

204132640 is a wasteful number, since it uses less digits than its factorization.

204132640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275844 (or 1275836 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 204132640 is about 14287.4994313211. The cubic root of 204132640 is about 588.8040891040.

The spelling of 204132640 in words is "two hundred four million, one hundred thirty-two thousand, six hundred forty".