1131230320 has 80 divisors (see below), whose sum is σ = 3038028768. Its totient is φ = 387153920.

The previous prime is 1131230311. The next prime is 1131230333. The reversal of 1131230320 is 230321311.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1131230294 and 1131230303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22849 + ... + 52768.

Almost surely, 2^1131230320 is an apocalyptic number.

1131230320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131230320 is an abundant number, since it is smaller than the sum of its proper divisors (1906798448).

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

1131230320 is a wasteful number, since it uses less digits than its factorization.

1131230320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75658 (or 75652 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1131230320 is about 33633.7675558359. The cubic root of 1131230320 is about 1041.9583170833.

Adding to 1131230320 its reverse (230321311), we get a palindrome (1361551631).

Subtracting from 1131230320 its reverse (230321311), we obtain a palindrome (900909009).

The spelling of 1131230320 in words is "one billion, one hundred thirty-one million, two hundred thirty thousand, three hundred twenty".