204000440240 has 40 divisors (see below), whose sum is σ = 474326778048. Its totient is φ = 81595745280.

The previous prime is 204000440219. The next prime is 204000440251. The reversal of 204000440240 is 42044000402.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×204000440240² (a number of 23 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1691384 + ... + 1807976.

Almost surely, 2^204000440240 is an apocalyptic number.

204000440240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204000440240 is an abundant number, since it is smaller than the sum of its proper divisors (270326337808).

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

204000440240 is a wasteful number, since it uses less digits than its factorization.

204000440240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138477 (or 138471 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 204000440240 its reverse (42044000402), we get a palindrome (246044440642).

The spelling of 204000440240 in words is "two hundred four billion, four hundred forty thousand, two hundred forty".