204102640 has 60 divisors (see below), whose sum is σ = 552024936. Its totient is φ = 69976704.

The previous prime is 204102611. The next prime is 204102673. The reversal of 204102640 is 46201402.

204102640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 22114 + ... + 29953.

Almost surely, 2^204102640 is an apocalyptic number.

204102640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204102640 is an abundant number, since it is smaller than the sum of its proper divisors (347922296).

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

204102640 is a wasteful number, since it uses less digits than its factorization.

204102640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52094 (or 52081 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 204102640 is about 14286.4495239370. The cubic root of 204102640 is about 588.7752434997.

The spelling of 204102640 in words is "two hundred four million, one hundred two thousand, six hundred forty".