204220040 has 32 divisors (see below), whose sum is σ = 460529280. Its totient is φ = 81504192.

The previous prime is 204220039. The next prime is 204220097. The reversal of 204220040 is 40022402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 204219997 and 204220024.

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, 13007 + ... + 24033.

It is an arithmetic number, because the mean of its divisors is an integer number (14391540).

Almost surely, 2^204220040 is an apocalyptic number.

204220040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204220040 is an abundant number, since it is smaller than the sum of its proper divisors (256309240).

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

204220040 is a wasteful number, since it uses less digits than its factorization.

204220040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11501 (or 11497 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 204220040 is about 14290.5577217966. The cubic root of 204220040 is about 588.8881098575. Note that the first 3 decimals are identical.

Adding to 204220040 its reverse (40022402), we get a palindrome (244242442).

The spelling of 204220040 in words is "two hundred four million, two hundred twenty thousand, forty".