204123040 has 48 divisors (see below), whose sum is σ = 526085280. Its totient is φ = 74225920.

The previous prime is 204123011. The next prime is 204123041. The reversal of 204123040 is 40321402.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (204123041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56230 + ... + 59749.

It is an arithmetic number, because the mean of its divisors is an integer number (10960110).

Almost surely, 2^204123040 is an apocalyptic number.

204123040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204123040 is an abundant number, since it is smaller than the sum of its proper divisors (321962240).

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

204123040 is a wasteful number, since it uses less digits than its factorization.

204123040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116005 (or 115997 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 204123040 is about 14287.1634693525. The cubic root of 204123040 is about 588.7948588181.

Adding to 204123040 its reverse (40321402), we get a palindrome (244444442).

The spelling of 204123040 in words is "two hundred four million, one hundred twenty-three thousand, forty".