1987127424 has 128 divisors (see below), whose sum is σ = 5885236800. Its totient is φ = 660068352.

The previous prime is 1987127413. The next prime is 1987127437. The reversal of 1987127424 is 4247217891.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 1987127424.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1198404 + ... + 1200060.

Almost surely, 2^1987127424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1987127424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2942618400).

1987127424 is an abundant number, since it is smaller than the sum of its proper divisors (3898109376).

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

1987127424 is a wasteful number, since it uses less digits than its factorization.

1987127424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027 (or 2009 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 1987127424 is about 44577.2074495476. The cubic root of 1987127424 is about 1257.2121582418.

The spelling of 1987127424 in words is "one billion, nine hundred eighty-seven million, one hundred twenty-seven thousand, four hundred twenty-four".