1144555320 has 64 divisors (see below), whose sum is σ = 3480729120. Its totient is φ = 301031424.

The previous prime is 1144555297. The next prime is 1144555333. The reversal of 1144555320 is 235554411.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 56569 + ... + 74088.

Almost surely, 2^1144555320 is an apocalyptic number.

1144555320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1144555320 is an abundant number, since it is smaller than the sum of its proper divisors (2336173800).

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

1144555320 is a wasteful number, since it uses less digits than its factorization.

1144555320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130744 (or 130740 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 1144555320 is about 33831.2772445854. The cubic root of 1144555320 is about 1046.0335066474.

Subtracting from 1144555320 its reverse (235554411), we obtain a palindrome (909000909).

The spelling of 1144555320 in words is "one billion, one hundred forty-four million, five hundred fifty-five thousand, three hundred twenty".