1443731745 has 32 divisors (see below), whose sum is σ = 2370936960. Its totient is φ = 749928960.

The previous prime is 1443731741. The next prime is 1443731761. The reversal of 1443731745 is 5471373441.

It is not a de Polignac number, because 1443731745 - 2² = 1443731741 is a prime.

It is a super-2 number, since 2×1443731745² = 4168722703041490050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1443731741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81375 + ... + 97515.

It is an arithmetic number, because the mean of its divisors is an integer number (74091780).

Almost surely, 2^1443731745 is an apocalyptic number.

1443731745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1443731745 is a deficient number, since it is larger than the sum of its proper divisors (927205215).

1443731745 is a wasteful number, since it uses less digits than its factorization.

1443731745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16305.

The product of its digits is 141120, while the sum is 39.

The square root of 1443731745 is about 37996.4701650035. The cubic root of 1443731745 is about 1130.2178672513.

It can be divided in two parts, 1443 and 731745, that multiplied together give a triangular number (1055908035 = T₄₅₉₅₄).

The spelling of 1443731745 in words is "one billion, four hundred forty-three million, seven hundred thirty-one thousand, seven hundred forty-five".