1680898 has 16 divisors (see below), whose sum is σ = 2650680. Its totient is φ = 798336.

The previous prime is 1680893. The next prime is 1680901. The reversal of 1680898 is 8980861.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1570009 + 110889 = 1253^2 + 333^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1680898.

It is not an unprimeable number, because it can be changed into a prime (1680893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4036 + ... + 4432.

2^1680898 is an apocalyptic number.

1680898 is a deficient number, since it is larger than the sum of its proper divisors (969782).

1680898 is a wasteful number, since it uses less digits than its factorization.

1680898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 1680898 is about 1296.4945044234. The cubic root of 1680898 is about 118.8996164012.

The spelling of 1680898 in words is "one million, six hundred eighty thousand, eight hundred ninety-eight".