1431323320 has 96 divisors (see below), whose sum is σ = 3867281280. Its totient is φ = 474888960.

The previous prime is 1431323317. The next prime is 1431323321. The reversal of 1431323320 is 233231341.

It is a junction number, because it is equal to n+sod(n) for n = 1431323291 and 1431323300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431323321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48982 + ... + 72538.

It is an arithmetic number, because the mean of its divisors is an integer number (40284180).

Almost surely, 2^1431323320 is an apocalyptic number.

1431323320 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 1431323320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1933640640).

1431323320 is an abundant number, since it is smaller than the sum of its proper divisors (2435957960).

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

1431323320 is a wasteful number, since it uses less digits than its factorization.

1431323320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23613 (or 23602 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 1431323320 is about 37832.8338880396. The cubic root of 1431323320 is about 1126.9705893589.

Adding to 1431323320 its reverse (233231341), we get a palindrome (1664554661).

The spelling of 1431323320 in words is "one billion, four hundred thirty-one million, three hundred twenty-three thousand, three hundred twenty".