1680900404 has 12 divisors (see below), whose sum is σ = 2960312964. Its totient is φ = 835096704.

The previous prime is 1680900391. The next prime is 1680900443. The reversal of 1680900404 is 4040090861.

It can be written as a sum of positive squares in 2 ways, for example, as 930250000 + 750650404 = 30500^2 + 27398^2 .

It is a congruent number.

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, 1337669 + ... + 1338924.

It is an arithmetic number, because the mean of its divisors is an integer number (246692747).

Almost surely, 2^1680900404 is an apocalyptic number.

It is an amenable number.

1680900404 is a deficient number, since it is larger than the sum of its proper divisors (1279412560).

1680900404 is a wasteful number, since it uses less digits than its factorization.

1680900404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676754 (or 2676752 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1680900404 is about 40998.7853966432. The cubic root of 1680900404 is about 1188.9967308405.

The spelling of 1680900404 in words is "one billion, six hundred eighty million, nine hundred thousand, four hundred four".