1683638 has 16 divisors (see below), whose sum is σ = 2785536. Its totient is φ = 756840.

The previous prime is 1683637. The next prime is 1683667. The reversal of 1683638 is 8363861.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1683598 and 1683607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1683631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1895 + ... + 2637.

It is an arithmetic number, because the mean of its divisors is an integer number (174096).

2^1683638 is an apocalyptic number.

1683638 is a deficient number, since it is larger than the sum of its proper divisors (1101898).

1683638 is a wasteful number, since it uses less digits than its factorization.

1683638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859.

The product of its digits is 20736, while the sum is 35.

The square root of 1683638 is about 1297.5507697196. The cubic root of 1683638 is about 118.9641866667.

The spelling of 1683638 in words is "one million, six hundred eighty-three thousand, six hundred thirty-eight".