204223440 has 80 divisors (see below), whose sum is σ = 660636288. Its totient is φ = 52090368.

The previous prime is 204223433. The next prime is 204223447. The reversal of 204223440 is 44322402.

204223440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (204223433) and next prime (204223447).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204223447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12979 + ... + 24018.

Almost surely, 2^204223440 is an apocalyptic number.

204223440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204223440 is an abundant number, since it is smaller than the sum of its proper divisors (456412848).

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

204223440 is a wasteful number, since it uses less digits than its factorization.

204223440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37036 (or 37030 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 204223440 is about 14290.6766809693. The cubic root of 204223440 is about 588.8913779149.

Adding to 204223440 its reverse (44322402), we get a palindrome (248545842).

The spelling of 204223440 in words is "two hundred four million, two hundred twenty-three thousand, four hundred forty".