204040008 has 24 divisors (see below), whose sum is σ = 552608550. Its totient is φ = 68013312.

The previous prime is 204040007. The next prime is 204040009. The reversal of 204040008 is 800040402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (204040007) and next prime (204040009).

It can be written as a sum of positive squares in only one way, i.e., 138721284 + 65318724 = 11778^2 + 8082^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (204040003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1416873 + ... + 1417016.

Almost surely, 2^204040008 is an apocalyptic number.

It is an amenable number.

204040008 is an abundant number, since it is smaller than the sum of its proper divisors (348568542).

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

204040008 is a wasteful number, since it uses less digits than its factorization.

204040008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833901 (or 2833894 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 204040008 is about 14284.2573485638. The cubic root of 204040008 is about 588.7150124583.

The spelling of 204040008 in words is "two hundred four million, forty thousand, eight".