1680402 has 16 divisors (see below), whose sum is σ = 3378240. Its totient is φ = 557232.

The previous prime is 1680401. The next prime is 1680407. The reversal of 1680402 is 2040861.

It is not an unprimeable number, because it can be changed into a prime (1680401) 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, 763 + ... + 1985.

It is an arithmetic number, because the mean of its divisors is an integer number (211140).

2^1680402 is an apocalyptic number.

1680402 is an abundant number, since it is smaller than the sum of its proper divisors (1697838).

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

1680402 is a wasteful number, since it uses less digits than its factorization.

1680402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1680402 is about 1296.3032052726. The cubic root of 1680402 is about 118.8879202698.

The spelling of 1680402 in words is "one million, six hundred eighty thousand, four hundred two".