853638 has 16 divisors (see below), whose sum is σ = 1807920. Its totient is φ = 267776.

The previous prime is 853637. The next prime is 853663. The reversal of 853638 is 836358.

It is a junction number, because it is equal to n+sod(n) for n = 853599 and 853608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4083 + ... + 4286.

It is an arithmetic number, because the mean of its divisors is an integer number (112995).

2⁸⁵³⁶³⁸ is an apocalyptic number.

853638 is an abundant number, since it is smaller than the sum of its proper divisors (954282).

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

853638 is a wasteful number, since it uses less digits than its factorization.

853638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8391.

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

The square root of 853638 is about 923.9253216575. The cubic root of 853638 is about 94.8617749727.

The spelling of 853638 in words is "eight hundred fifty-three thousand, six hundred thirty-eight".