1680517992 has 32 divisors (see below), whose sum is σ = 4242898080. Its totient is φ = 554625600.

The previous prime is 1680517991. The next prime is 1680517997. The reversal of 1680517992 is 2997150861.

It is not an unprimeable number, because it can be changed into a prime (1680517991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344218 + ... + 349065.

It is an arithmetic number, because the mean of its divisors is an integer number (132590565).

Almost surely, 2^1680517992 is an apocalyptic number.

1680517992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1680517992 is an abundant number, since it is smaller than the sum of its proper divisors (2562380088).

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

1680517992 is a wasteful number, since it uses less digits than its factorization.

1680517992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693393 (or 693389 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 48.

The square root of 1680517992 is about 40994.1214322249. The cubic root of 1680517992 is about 1188.9065567287.

The spelling of 1680517992 in words is "one billion, six hundred eighty million, five hundred seventeen thousand, nine hundred ninety-two".