393636 has 12 divisors (see below), whose sum is σ = 918512. Its totient is φ = 131208.

The previous prime is 393629. The next prime is 393637. The reversal of 393636 is 636393.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (393637) by changing a digit.

393636 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16390 + ... + 16413.

2³⁹³⁶³⁶ is an apocalyptic number.

It is an amenable number.

393636 is an abundant number, since it is smaller than the sum of its proper divisors (524876).

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

393636 is a wasteful number, since it uses less digits than its factorization.

393636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32810 (or 32808 counting only the distinct ones).

The product of its digits is 8748, while the sum is 30.

The square root of 393636 is about 627.4041759504. The cubic root of 393636 is about 73.2877862254.

It can be divided in two parts, 3 and 93636, that added together give a palindrome (93639).

The spelling of 393636 in words is "three hundred ninety-three thousand, six hundred thirty-six".