1683820 has 12 divisors (see below), whose sum is σ = 3536064. Its totient is φ = 673520.

The previous prime is 1683817. The next prime is 1683839. The reversal of 1683820 is 283861.

It is a d-powerful number, because it can be written as 1 + 6⁸ + 8² + 3³ + 8⁴ + 2⁴ + 0 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42076 + ... + 42115.

It is an arithmetic number, because the mean of its divisors is an integer number (294672).

2^1683820 is an apocalyptic number.

1683820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1683820 is an abundant number, since it is smaller than the sum of its proper divisors (1852244).

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

1683820 is a wasteful number, since it uses less digits than its factorization.

1683820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84200 (or 84198 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1683820 is about 1297.6208999550. The cubic root of 1683820 is about 118.9684731585.

The spelling of 1683820 in words is "one million, six hundred eighty-three thousand, eight hundred twenty".