1685940 has 24 divisors (see below), whose sum is σ = 4720800. Its totient is φ = 449568.

The previous prime is 1685933. The next prime is 1685951. The reversal of 1685940 is 495861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13990 + ... + 14109.

It is an arithmetic number, because the mean of its divisors is an integer number (196700).

2^1685940 is an apocalyptic number.

1685940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1685940 is an abundant number, since it is smaller than the sum of its proper divisors (3034860).

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

1685940 is a wasteful number, since it uses less digits than its factorization.

1685940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28111 (or 28109 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1685940 is about 1298.4375225632. The cubic root of 1685940 is about 119.0183809848.

The spelling of 1685940 in words is "one million, six hundred eighty-five thousand, nine hundred forty".