1204431220 has 48 divisors (see below), whose sum is σ = 2647766016. Its totient is φ = 459648000.

The previous prime is 1204431209. The next prime is 1204431229. The reversal of 1204431220 is 221344021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1204431229) 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, 30340 + ... + 57700.

It is an arithmetic number, because the mean of its divisors is an integer number (55161792).

Almost surely, 2^1204431220 is an apocalyptic number.

1204431220 is a gapful number since it is divisible by the number (10) 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 1204431220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1323883008).

1204431220 is an abundant number, since it is smaller than the sum of its proper divisors (1443334796).

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

1204431220 is a wasteful number, since it uses less digits than its factorization.

1204431220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27472 (or 27470 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1204431220 is about 34704.9163664170. The cubic root of 1204431220 is about 1063.9649829714.

Adding to 1204431220 its reverse (221344021), we get a palindrome (1425775241).

It can be divided in two parts, 12044 and 31220, that added together give a square (43264 = 208²).

The spelling of 1204431220 in words is "one billion, two hundred four million, four hundred thirty-one thousand, two hundred twenty".