1943449644 has 24 divisors (see below), whose sum is σ = 4680997888. Its totient is φ = 626919120.

The previous prime is 1943449643. The next prime is 1943449687. The reversal of 1943449644 is 4469443491.

It is a junction number, because it is equal to n+sod(n) for n = 1943449593 and 1943449602.

It is not an unprimeable number, because it can be changed into a prime (1943449643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2611792 + ... + 2612535.

Almost surely, 2^1943449644 is an apocalyptic number.

It is an amenable number.

1943449644 is an abundant number, since it is smaller than the sum of its proper divisors (2737548244).

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

1943449644 is a wasteful number, since it uses less digits than its factorization.

1943449644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5224365 (or 5224363 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 48.

The square root of 1943449644 is about 44084.5737645267. The cubic root of 1943449644 is about 1247.9325063146.

The spelling of 1943449644 in words is "one billion, nine hundred forty-three million, four hundred forty-nine thousand, six hundred forty-four".