835638 has 8 divisors (see below), whose sum is σ = 1671288. Its totient is φ = 278544.

The previous prime is 835633. The next prime is 835643. The reversal of 835638 is 836538.

It is an interprime number because it is at equal distance from previous prime (835633) and next prime (835643).

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

835638 is an admirable number.

It is a Curzon number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 835599 and 835608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (835633) 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, 69631 + ... + 69642.

It is an arithmetic number, because the mean of its divisors is an integer number (208911).

2⁸³⁵⁶³⁸ is an apocalyptic number.

835638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

835638 is a wasteful number, since it uses less digits than its factorization.

835638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139278.

The product of its digits is 17280, while the sum is 33.

The square root of 835638 is about 914.1323755343. The cubic root of 835638 is about 94.1902740126.

Subtracting 835638 from its reverse (836538), we obtain a square (900 = 30²).

The spelling of 835638 in words is "eight hundred thirty-five thousand, six hundred thirty-eight".