1987976036 has 24 divisors (see below), whose sum is σ = 3508333920. Its totient is φ = 985623552.

The previous prime is 1987976009. The next prime is 1987976041. The reversal of 1987976036 is 6306797891.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301220 + ... + 307748.

It is an arithmetic number, because the mean of its divisors is an integer number (146180580).

Almost surely, 2^1987976036 is an apocalyptic number.

It is an amenable number.

1987976036 is a deficient number, since it is larger than the sum of its proper divisors (1520357884).

1987976036 is a wasteful number, since it uses less digits than its factorization.

1987976036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7163 (or 7161 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 56.

The square root of 1987976036 is about 44586.7248853288. The cubic root of 1987976036 is about 1257.3910988698.

The spelling of 1987976036 in words is "one billion, nine hundred eighty-seven million, nine hundred seventy-six thousand, thirty-six".