1144305520 has 40 divisors (see below), whose sum is σ = 2694202560. Its totient is φ = 451925760.

The previous prime is 1144305497. The next prime is 1144305523. The reversal of 1144305520 is 255034411.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144305523) 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, 84211 + ... + 96850.

It is an arithmetic number, because the mean of its divisors is an integer number (67355064).

Almost surely, 2^1144305520 is an apocalyptic number.

1144305520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1144305520 is an abundant number, since it is smaller than the sum of its proper divisors (1549897040).

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

1144305520 is a wasteful number, since it uses less digits than its factorization.

1144305520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181153 (or 181147 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1144305520 is about 33827.5851931526. The cubic root of 1144305520 is about 1045.9574019287.

Adding to 1144305520 its reverse (255034411), we get a palindrome (1399339931).

The spelling of 1144305520 in words is "one billion, one hundred forty-four million, three hundred five thousand, five hundred twenty".