204423240 has 128 divisors (see below), whose sum is σ = 703791360. Its totient is φ = 46531584.

The previous prime is 204423239. The next prime is 204423277. The reversal of 204423240 is 42324402.

It is a super-2 number, since 2×204423240² = 83577722104195200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 333174 + ... + 333786.

It is an arithmetic number, because the mean of its divisors is an integer number (5498370).

Almost surely, 2^204423240 is an apocalyptic number.

204423240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204423240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351895680).

204423240 is an abundant number, since it is smaller than the sum of its proper divisors (499368120).

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

204423240 is a wasteful number, since it uses less digits than its factorization.

204423240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031 (or 1027 counting only the distinct ones).

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

The square root of 204423240 is about 14297.6655437173. The cubic root of 204423240 is about 589.0833606888.

Adding to 204423240 its reverse (42324402), we get a palindrome (246747642).

The spelling of 204423240 in words is "two hundred four million, four hundred twenty-three thousand, two hundred forty".