1680017740 has 24 divisors (see below), whose sum is σ = 3610086480. Its totient is φ = 656378688.

The previous prime is 1680017701. The next prime is 1680017749. The reversal of 1680017740 is 477100861.

It is a junction number, because it is equal to n+sod(n) for n = 1680017696 and 1680017705.

It is not an unprimeable number, because it can be changed into a prime (1680017749) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 975895 + ... + 977614.

It is an arithmetic number, because the mean of its divisors is an integer number (150420270).

Almost surely, 2^1680017740 is an apocalyptic number.

1680017740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1680017740 is an abundant number, since it is smaller than the sum of its proper divisors (1930068740).

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

1680017740 is a wasteful number, since it uses less digits than its factorization.

1680017740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953561 (or 1953559 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 1680017740 is about 40988.0194691083. The cubic root of 1680017740 is about 1188.7885748703.

The spelling of 1680017740 in words is "one billion, six hundred eighty million, seventeen thousand, seven hundred forty".