1682690 has 8 divisors (see below), whose sum is σ = 3028860. Its totient is φ = 673072.

The previous prime is 1682671. The next prime is 1682693. The reversal of 1682690 is 962861.

It can be written as a sum of positive squares in 2 ways, for example, as 1545049 + 137641 = 1243^2 + 371^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1682690³ = 14293335772227327000, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1682693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84125 + ... + 84144.

2^1682690 is an apocalyptic number.

1682690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1682690 is a deficient number, since it is larger than the sum of its proper divisors (1346170).

1682690 is a wasteful number, since it uses less digits than its factorization.

1682690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168276.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1682690 is about 1297.1854146574. The cubic root of 1682690 is about 118.9418542289.

The spelling of 1682690 in words is "one million, six hundred eighty-two thousand, six hundred ninety".