204397688 has 32 divisors (see below), whose sum is σ = 436268160. Its totient is φ = 88867680.

The previous prime is 204397673. The next prime is 204397703. The reversal of 204397688 is 886793402.

It is an interprime number because it is at equal distance from previous prime (204397673) and next prime (204397703).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48470 + ... + 52517.

It is an arithmetic number, because the mean of its divisors is an integer number (13633380).

Almost surely, 2^204397688 is an apocalyptic number.

It is an amenable number.

204397688 is an abundant number, since it is smaller than the sum of its proper divisors (231870472).

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

204397688 is a wasteful number, since it uses less digits than its factorization.

204397688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101027 (or 101023 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 204397688 is about 14296.7719433444. The cubic root of 204397688 is about 589.0588153953.

The spelling of 204397688 in words is "two hundred four million, three hundred ninety-seven thousand, six hundred eighty-eight".