1987985762 has 24 divisors (see below), whose sum is σ = 3482695440. Its totient is φ = 848589000.

The previous prime is 1987985719. The next prime is 1987985773. The reversal of 1987985762 is 2675897891.

It is a junction number, because it is equal to n+sod(n) for n = 1987985695 and 1987985704.

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, 15812 + ... + 65007.

It is an arithmetic number, because the mean of its divisors is an integer number (145112310).

Almost surely, 2^1987985762 is an apocalyptic number.

1987985762 is a deficient number, since it is larger than the sum of its proper divisors (1494709678).

1987985762 is a wasteful number, since it uses less digits than its factorization.

1987985762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81086 (or 81079 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 62.

The square root of 1987985762 is about 44586.8339535339. The cubic root of 1987985762 is about 1257.3931494253.

The spelling of 1987985762 in words is "one billion, nine hundred eighty-seven million, nine hundred eighty-five thousand, seven hundred sixty-two".