1944887988 has 12 divisors (see below), whose sum is σ = 4538072000. Its totient is φ = 648295992.

The previous prime is 1944887983. The next prime is 1944888037. The reversal of 1944887988 is 8897884491.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944887983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81036988 + ... + 81037011.

Almost surely, 2^1944887988 is an apocalyptic number.

It is an amenable number.

1944887988 is an abundant number, since it is smaller than the sum of its proper divisors (2593184012).

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

1944887988 is a wasteful number, since it uses less digits than its factorization.

1944887988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162074006 (or 162074004 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 66.

The square root of 1944887988 is about 44100.8842088228. The cubic root of 1944887988 is about 1248.2402946856.

The spelling of 1944887988 in words is "one billion, nine hundred forty-four million, eight hundred eighty-seven thousand, nine hundred eighty-eight".