1423231320 has 128 divisors (see below), whose sum is σ = 4887267840. Its totient is φ = 324802560.

The previous prime is 1423231301. The next prime is 1423231357. The reversal of 1423231320 is 231323241.

1423231320 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

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, 915664 + ... + 917216.

It is an arithmetic number, because the mean of its divisors is an integer number (38181780).

Almost surely, 2^1423231320 is an apocalyptic number.

1423231320 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 1423231320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2443633920).

1423231320 is an abundant number, since it is smaller than the sum of its proper divisors (3464036520).

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

1423231320 is a wasteful number, since it uses less digits than its factorization.

1423231320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665 (or 2661 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1423231320 is about 37725.7381637523. The cubic root of 1423231320 is about 1124.8427948236.

Adding to 1423231320 its reverse (231323241), we get a palindrome (1654554561).

The spelling of 1423231320 in words is "one billion, four hundred twenty-three million, two hundred thirty-one thousand, three hundred twenty".