1233431320 has 32 divisors (see below), whose sum is σ = 3027514320. Its totient is φ = 448520320.

The previous prime is 1233431299. The next prime is 1233431321. The reversal of 1233431320 is 231343321.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1233431291 and 1233431300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233431321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1401187 + ... + 1402066.

Almost surely, 2^1233431320 is an apocalyptic number.

1233431320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1233431320 is an abundant number, since it is smaller than the sum of its proper divisors (1794083000).

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

1233431320 is a wasteful number, since it uses less digits than its factorization.

1233431320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803275 (or 2803271 counting only the distinct ones).

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

The square root of 1233431320 is about 35120.2408875566. The cubic root of 1233431320 is about 1072.4366746824.

Adding to 1233431320 its reverse (231343321), we get a palindrome (1464774641).

The spelling of 1233431320 in words is "one billion, two hundred thirty-three million, four hundred thirty-one thousand, three hundred twenty".