1685040 has 160 divisors (see below), whose sum is σ = 6428160. Its totient is φ = 356352.

The previous prime is 1685039. The next prime is 1685051. The reversal of 1685040 is 405861.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1685040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28531 + ... + 28589.

It is an arithmetic number, because the mean of its divisors is an integer number (40176).

2^1685040 is an apocalyptic number.

1685040 is a gapful number since it is divisible by the number (10) 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 1685040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3214080).

1685040 is an abundant number, since it is smaller than the sum of its proper divisors (4743120).

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

1685040 is a wasteful number, since it uses less digits than its factorization.

1685040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 93 counting only the distinct ones).

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

The square root of 1685040 is about 1298.0909059076. The cubic root of 1685040 is about 118.9971988136.

The spelling of 1685040 in words is "one million, six hundred eighty-five thousand, forty".