1680406688 has 24 divisors (see below), whose sum is σ = 3323150208. Its totient is φ = 836432064.

The previous prime is 1680406687. The next prime is 1680406697. The reversal of 1680406688 is 8866040861.

It is not an unprimeable number, because it can be changed into a prime (1680406681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110606 + ... + 124877.

It is an arithmetic number, because the mean of its divisors is an integer number (138464592).

Almost surely, 2^1680406688 is an apocalyptic number.

It is an amenable number.

1680406688 is a deficient number, since it is larger than the sum of its proper divisors (1642743520).

1680406688 is a wasteful number, since it uses less digits than its factorization.

1680406688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235716 (or 235708 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 1680406688 is about 40992.7638492454. The cubic root of 1680406688 is about 1188.8803082788.

The spelling of 1680406688 in words is "one billion, six hundred eighty million, four hundred six thousand, six hundred eighty-eight".