204013440 has 96 divisors (see below), whose sum is σ = 704503800. Its totient is φ = 54402048.

The previous prime is 204013423. The next prime is 204013441. The reversal of 204013440 is 44310402.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204013441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11950 + ... + 23469.

Almost surely, 2^204013440 is an apocalyptic number.

204013440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204013440 is an abundant number, since it is smaller than the sum of its proper divisors (500490360).

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

204013440 is a wasteful number, since it uses less digits than its factorization.

204013440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35444 (or 35429 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 204013440 is about 14283.3273434449. The cubic root of 204013440 is about 588.6894592028.

Adding to 204013440 its reverse (44310402), we get a palindrome (248323842).

The spelling of 204013440 in words is "two hundred four million, thirteen thousand, four hundred forty".