204023440 has 40 divisors (see below), whose sum is σ = 475148160. Its totient is φ = 81472896.

The previous prime is 204023423. The next prime is 204023453. The reversal of 204023440 is 44320402.

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

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, 55747 + ... + 59293.

It is an arithmetic number, because the mean of its divisors is an integer number (11878704).

Almost surely, 2^204023440 is an apocalyptic number.

204023440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204023440 is an abundant number, since it is smaller than the sum of its proper divisors (271124720).

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

204023440 is a wasteful number, since it uses less digits than its factorization.

204023440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4279 (or 4273 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 204023440 is about 14283.6773976452. The cubic root of 204023440 is about 588.6990775208.

Adding to 204023440 its reverse (44320402), we get a palindrome (248343842).

The spelling of 204023440 in words is "two hundred four million, twenty-three thousand, four hundred forty".