675638 has 8 divisors (see below), whose sum is σ = 1017360. Its totient is φ = 336520.

The previous prime is 675629. The next prime is 675643. The reversal of 675638 is 836576.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 675598 and 675607.

It is a congruent number.

It is an unprimeable number.

675638 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 248 + ... + 1188.

It is an arithmetic number, because the mean of its divisors is an integer number (127170).

2⁶⁷⁵⁶³⁸ is an apocalyptic number.

675638 is a deficient number, since it is larger than the sum of its proper divisors (341722).

675638 is a wasteful number, since it uses less digits than its factorization.

675638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302.

The product of its digits is 30240, while the sum is 35.

The square root of 675638 is about 821.9720189885. The cubic root of 675638 is about 87.7481608259.

The spelling of 675638 in words is "six hundred seventy-five thousand, six hundred thirty-eight".