1680492920 has 16 divisors (see below), whose sum is σ = 3781109160. Its totient is φ = 672197152.

The previous prime is 1680492883. The next prime is 1680493007. The reversal of 1680492920 is 292940861.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21006122 + ... + 21006201.

Almost surely, 2^1680492920 is an apocalyptic number.

1680492920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1680492920 is an abundant number, since it is smaller than the sum of its proper divisors (2100616240).

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

1680492920 is a wasteful number, since it uses less digits than its factorization.

1680492920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42012334 (or 42012330 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1680492920 is about 40993.8156311412. The cubic root of 1680492920 is about 1188.9006441839.

The spelling of 1680492920 in words is "one billion, six hundred eighty million, four hundred ninety-two thousand, nine hundred twenty".