1680344380 has 48 divisors (see below), whose sum is σ = 4145639904. Its totient is φ = 564030720.

The previous prime is 1680344353. The next prime is 1680344387. The reversal of 1680344380 is 834430861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680344387) 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 15 ways as a sum of consecutive naturals, for example, 290907 + ... + 296626.

It is an arithmetic number, because the mean of its divisors is an integer number (86367498).

Almost surely, 2^1680344380 is an apocalyptic number.

1680344380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1680344380 is an abundant number, since it is smaller than the sum of its proper divisors (2465295524).

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

1680344380 is a wasteful number, since it uses less digits than its factorization.

1680344380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587566 (or 587564 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 1680344380 is about 40992.0038544104. The cubic root of 1680344380 is about 1188.8656138856.

The spelling of 1680344380 in words is "one billion, six hundred eighty million, three hundred forty-four thousand, three hundred eighty".