1680748044 has 24 divisors (see below), whose sum is σ = 4152436848. Its totient is φ = 527293440.

The previous prime is 1680747941. The next prime is 1680748073. The reversal of 1680748044 is 4408470861.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1680747987 and 1680748005.

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 7 ways as a sum of consecutive naturals, for example, 4119277 + ... + 4119684.

It is an arithmetic number, because the mean of its divisors is an integer number (173018202).

Almost surely, 2^1680748044 is an apocalyptic number.

It is an amenable number.

1680748044 is an abundant number, since it is smaller than the sum of its proper divisors (2471688804).

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

1680748044 is a wasteful number, since it uses less digits than its factorization.

1680748044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8238985 (or 8238983 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 42.

The square root of 1680748044 is about 40996.9272507099. The cubic root of 1680748044 is about 1188.9608054490.

The spelling of 1680748044 in words is "one billion, six hundred eighty million, seven hundred forty-eight thousand, forty-four".