1680047340 has 24 divisors (see below), whose sum is σ = 4704132720. Its totient is φ = 448012608.

The previous prime is 1680047309. The next prime is 1680047363. The reversal of 1680047340 is 437400861.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14000335 + ... + 14000454.

It is an arithmetic number, because the mean of its divisors is an integer number (196005530).

Almost surely, 2^1680047340 is an apocalyptic number.

1680047340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1680047340 is an abundant number, since it is smaller than the sum of its proper divisors (3024085380).

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

1680047340 is a wasteful number, since it uses less digits than its factorization.

1680047340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28000801 (or 28000799 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 1680047340 is about 40988.3805486384. The cubic root of 1680047340 is about 1188.7955565297.

The spelling of 1680047340 in words is "one billion, six hundred eighty million, forty-seven thousand, three hundred forty".