1944435648 has 56 divisors (see below), whose sum is σ = 5194653568. Its totient is φ = 641846016.

The previous prime is 1944435643. The next prime is 1944435653. The reversal of 1944435648 is 8465344491.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1944435643) and next prime (1944435653).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1944435597 and 1944435606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944435643) 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, 29386 + ... + 68937.

Almost surely, 2^1944435648 is an apocalyptic number.

It is an amenable number.

1944435648 is an abundant number, since it is smaller than the sum of its proper divisors (3250217920).

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

1944435648 is a wasteful number, since it uses less digits than its factorization.

1944435648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98441 (or 98431 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 48.

The square root of 1944435648 is about 44095.7554419924. The cubic root of 1944435648 is about 1248.1435157112.

The spelling of 1944435648 in words is "one billion, nine hundred forty-four million, four hundred thirty-five thousand, six hundred forty-eight".