1439145844 has 24 divisors (see below), whose sum is σ = 2609720960. Its totient is φ = 693935424.

The previous prime is 1439145833. The next prime is 1439145847. The reversal of 1439145844 is 4485419341.

It is a super-2 number, since 2×1439145844² = 4142281520604944672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a self number, because there is not a number n which added to its sum of digits gives 1439145844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1439145847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39369 + ... + 66544.

Almost surely, 2^1439145844 is an apocalyptic number.

It is an amenable number.

1439145844 is a deficient number, since it is larger than the sum of its proper divisors (1170575116).

1439145844 is a wasteful number, since it uses less digits than its factorization.

1439145844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106039 (or 106037 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The square root of 1439145844 is about 37936.0757590977. The cubic root of 1439145844 is about 1129.0199150602.

The spelling of 1439145844 in words is "one billion, four hundred thirty-nine million, one hundred forty-five thousand, eight hundred forty-four".