1144322520 has 128 divisors (see below), whose sum is σ = 3755808000. Its totient is φ = 276615680.

The previous prime is 1144322507. The next prime is 1144322567. The reversal of 1144322520 is 252234411.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 552046 + ... + 554114.

It is an arithmetic number, because the mean of its divisors is an integer number (29342250).

Almost surely, 2^1144322520 is an apocalyptic number.

1144322520 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 1144322520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1877904000).

1144322520 is an abundant number, since it is smaller than the sum of its proper divisors (2611485480).

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

1144322520 is a wasteful number, since it uses less digits than its factorization.

1144322520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513 (or 2509 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1144322520 is about 33827.8364664369. The cubic root of 1144322520 is about 1045.9625815442.

Adding to 1144322520 its reverse (252234411), we get a palindrome (1396556931).

The spelling of 1144322520 in words is "one billion, one hundred forty-four million, three hundred twenty-two thousand, five hundred twenty".