53686812 has 12 divisors (see below), whose sum is σ = 125269256. Its totient is φ = 17895600.

The previous prime is 53686811. The next prime is 53686849. The reversal of 53686812 is 21868635.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53686811) 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, 2236939 + ... + 2236962.

Almost surely, 2^53686812 is an apocalyptic number.

It is an amenable number.

53686812 is an abundant number, since it is smaller than the sum of its proper divisors (71582444).

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

53686812 is a wasteful number, since it uses less digits than its factorization.

53686812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473908 (or 4473906 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 53686812 is about 7327.1284962119. The cubic root of 53686812 is about 377.2441715051.

The spelling of 53686812 in words is "fifty-three million, six hundred eighty-six thousand, eight hundred twelve".