1685628 has 36 divisors (see below), whose sum is σ = 4870320. Its totient is φ = 481536.

The previous prime is 1685627. The next prime is 1685681. The reversal of 1685628 is 8265861.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1685592 and 1685601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685627) 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, 3093 + ... + 3596.

2^1685628 is an apocalyptic number.

1685628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1685628 is an abundant number, since it is smaller than the sum of its proper divisors (3184692).

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

1685628 is a wasteful number, since it uses less digits than its factorization.

1685628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6706 (or 6701 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 1685628 is about 1298.3173726019. The cubic root of 1685628 is about 119.0110386860.

The spelling of 1685628 in words is "one million, six hundred eighty-five thousand, six hundred twenty-eight".