1986973500 has 48 divisors (see below), whose sum is σ = 5786071200. Its totient is φ = 529859200.

The previous prime is 1986973463. The next prime is 1986973501. The reversal of 1986973500 is 53796891.

It is a self number, because there is not a number n which added to its sum of digits gives 1986973500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986973501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660825 + ... + 663824.

It is an arithmetic number, because the mean of its divisors is an integer number (120543150).

Almost surely, 2^1986973500 is an apocalyptic number.

1986973500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1986973500 is an abundant number, since it is smaller than the sum of its proper divisors (3799097700).

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

1986973500 is a wasteful number, since it uses less digits than its factorization.

1986973500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324671 (or 1324659 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 1986973500 is about 44575.4809284207. The cubic root of 1986973500 is about 1257.1796959517.

The spelling of 1986973500 in words is "one billion, nine hundred eighty-six million, nine hundred seventy-three thousand, five hundred".