1681984852 has 12 divisors (see below), whose sum is σ = 2947055776. Its totient is φ = 839968920.

The previous prime is 1681984847. The next prime is 1681984867. The reversal of 1681984852 is 2584891861.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1681984852.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252174 + ... + 258757.

Almost surely, 2^1681984852 is an apocalyptic number.

It is an amenable number.

1681984852 is a deficient number, since it is larger than the sum of its proper divisors (1265070924).

1681984852 is a wasteful number, since it uses less digits than its factorization.

1681984852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511758 (or 511756 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 52.

The square root of 1681984852 is about 41012.0086316191. The cubic root of 1681984852 is about 1189.2523731801.

The spelling of 1681984852 in words is "one billion, six hundred eighty-one million, nine hundred eighty-four thousand, eight hundred fifty-two".