1443661344 has 72 divisors (see below), whose sum is σ = 4321502640. Its totient is φ = 455891328.

The previous prime is 1443661283. The next prime is 1443661357. The reversal of 1443661344 is 4431663441.

1443661344 is a `hidden beast` number, since 1 + 4 + 4 + 36 + 613 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1443661299 and 1443661308.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126442 + ... + 137385.

It is an arithmetic number, because the mean of its divisors is an integer number (60020870).

Almost surely, 2^1443661344 is an apocalyptic number.

It is an amenable number.

1443661344 is an abundant number, since it is smaller than the sum of its proper divisors (2877841296).

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

1443661344 is a wasteful number, since it uses less digits than its factorization.

1443661344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263862 (or 263851 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The square root of 1443661344 is about 37995.5437387070. The cubic root of 1443661344 is about 1130.1994959341.

The spelling of 1443661344 in words is "one billion, four hundred forty-three million, six hundred sixty-one thousand, three hundred forty-four".