1145313644 has 24 divisors (see below), whose sum is σ = 2033987088. Its totient is φ = 564192000.

The previous prime is 1145313607. The next prime is 1145313667. The reversal of 1145313644 is 4463135411.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1145313644.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380144 + ... + 383144.

It is an arithmetic number, because the mean of its divisors is an integer number (84749462).

Almost surely, 2^1145313644 is an apocalyptic number.

It is an amenable number.

1145313644 is a deficient number, since it is larger than the sum of its proper divisors (888673444).

1145313644 is a wasteful number, since it uses less digits than its factorization.

1145313644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4385 (or 4383 counting only the distinct ones).

The product of its digits is 17280, while the sum is 32.

The square root of 1145313644 is about 33842.4828285396. The cubic root of 1145313644 is about 1046.2644718028.

The spelling of 1145313644 in words is "one billion, one hundred forty-five million, three hundred thirteen thousand, six hundred forty-four".