1680764 has 6 divisors (see below), whose sum is σ = 2941344. Its totient is φ = 840380.

The previous prime is 1680761. The next prime is 1680779. The reversal of 1680764 is 4670861.

It is a d-powerful number, because it can be written as 1 + 6² + 8³ + 0 + 7³ + 6⁸ + 4⁴ .

It is a self number, because there is not a number n which added to its sum of digits gives 1680764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210092 + ... + 210099.

It is an arithmetic number, because the mean of its divisors is an integer number (490224).

2^1680764 is an apocalyptic number.

It is an amenable number.

1680764 is a deficient number, since it is larger than the sum of its proper divisors (1260580).

1680764 is a wasteful number, since it uses less digits than its factorization.

1680764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420195 (or 420193 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 1680764 is about 1296.4428255808. The cubic root of 1680764 is about 118.8964567861.

The spelling of 1680764 in words is "one million, six hundred eighty thousand, seven hundred sixty-four".