204112640 has 36 divisors (see below), whose sum is σ = 488916624. Its totient is φ = 81644544.

The previous prime is 204112639. The next prime is 204112661. The reversal of 204112640 is 46211402.

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

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, 78452 + ... + 81011.

Almost surely, 2^204112640 is an apocalyptic number.

204112640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204112640 is an abundant number, since it is smaller than the sum of its proper divisors (284803984).

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

204112640 is an equidigital number, since it uses as much as digits as its factorization.

204112640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159484 (or 159470 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 204112640 is about 14286.7995016379. The cubic root of 204112640 is about 588.7848590152.

The spelling of 204112640 in words is "two hundred four million, one hundred twelve thousand, six hundred forty".