1680528 has 40 divisors (see below), whose sum is σ = 4388608. Its totient is φ = 554112.

The previous prime is 1680527. The next prime is 1680529. The reversal of 1680528 is 8250861.

It is an interprime number because it is at equal distance from previous prime (1680527) and next prime (1680529).

It is a nialpdrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 1680495 and 1680504.

It is not an unprimeable number, because it can be changed into a prime (1680527) 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, 7425 + ... + 7647.

2^1680528 is an apocalyptic number.

It is an amenable number.

1680528 is an abundant number, since it is smaller than the sum of its proper divisors (2708080).

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

1680528 is a wasteful number, since it uses less digits than its factorization.

1680528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 1680528 is about 1296.3518041026. The cubic root of 1680528 is about 118.8908916825.

The spelling of 1680528 in words is "one million, six hundred eighty thousand, five hundred twenty-eight".