1145534320 has 320 divisors, whose sum is σ = 3474063360. Its totient is φ = 342144000.

The previous prime is 1145534317. The next prime is 1145534321. The reversal of 1145534320 is 234355411.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145534321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7586245 + ... + 7586395.

It is an arithmetic number, because the mean of its divisors is an integer number (10856448).

Almost surely, 2^1145534320 is an apocalyptic number.

1145534320 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 1145534320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737031680).

1145534320 is an abundant number, since it is smaller than the sum of its proper divisors (2328529040).

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

1145534320 is a wasteful number, since it uses less digits than its factorization.

1145534320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1145534320 is about 33845.7430114926. The cubic root of 1145534320 is about 1046.3316646434.

Adding to 1145534320 its reverse (234355411), we get a palindrome (1379889731).

The spelling of 1145534320 in words is "one billion, one hundred forty-five million, five hundred thirty-four thousand, three hundred twenty".