1680879880 has 16 divisors (see below), whose sum is σ = 3781979820. Its totient is φ = 672351936.

The previous prime is 1680879869. The next prime is 1680879917. The reversal of 1680879880 is 889780861.

It can be written as a sum of positive squares in 2 ways, for example, as 1594724356 + 86155524 = 39934^2 + 9282^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21010959 + ... + 21011038.

Almost surely, 2^1680879880 is an apocalyptic number.

1680879880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1680879880 is an abundant number, since it is smaller than the sum of its proper divisors (2101099940).

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

1680879880 is a wasteful number, since it uses less digits than its factorization.

1680879880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42022008 (or 42022004 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 55.

The square root of 1680879880 is about 40998.5350957812. The cubic root of 1680879880 is about 1188.9918915556.

The spelling of 1680879880 in words is "one billion, six hundred eighty million, eight hundred seventy-nine thousand, eight hundred eighty".