1680504 has 48 divisors (see below), whose sum is σ = 4890600. Its totient is φ = 479808.

The previous prime is 1680491. The next prime is 1680509. The reversal of 1680504 is 4050861.

It is a Harshad number since it is a multiple of its sum of digits (24).

1680504 is a modest number, since divided by 504 gives 168 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 462 + ... + 1890.

2^1680504 is an apocalyptic number.

1680504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1680504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2445300).

1680504 is an abundant number, since it is smaller than the sum of its proper divisors (3210096).

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

1680504 is a wasteful number, since it uses less digits than its factorization.

1680504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452 (or 1441 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1680504 is about 1296.3425473230. The cubic root of 1680504 is about 118.8903257106.

The spelling of 1680504 in words is "one million, six hundred eighty thousand, five hundred four".