1443840172 has 12 divisors (see below), whose sum is σ = 2659705720. Its totient is φ = 683924256.

The previous prime is 1443840163. The next prime is 1443840173. The reversal of 1443840172 is 2710483441.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1443840173) 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 3 ways as a sum of consecutive naturals, for example, 9498873 + ... + 9499024.

Almost surely, 2^1443840172 is an apocalyptic number.

It is an amenable number.

1443840172 is a deficient number, since it is larger than the sum of its proper divisors (1215865548).

1443840172 is a wasteful number, since it uses less digits than its factorization.

1443840172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18997920 (or 18997918 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 1443840172 is about 37997.8969418046. The cubic root of 1443840172 is about 1130.2461603802.

The spelling of 1443840172 in words is "one billion, four hundred forty-three million, eight hundred forty thousand, one hundred seventy-two".