7212636 has 18 divisors (see below), whose sum is σ = 18232032. Its totient is φ = 2404200.

The previous prime is 7212599. The next prime is 7212637. The reversal of 7212636 is 6362127.

It is a happy number.

7212636 is a `hidden beast` number, since 7 + 21 + 2 + 636 = 666.

7212636 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7212637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100140 + ... + 100211.

Almost surely, 2^7212636 is an apocalyptic number.

It is an amenable number.

7212636 is an abundant number, since it is smaller than the sum of its proper divisors (11019396).

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

7212636 is a wasteful number, since it uses less digits than its factorization.

7212636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200361 (or 200356 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 7212636 is about 2685.6351204138. The cubic root of 7212636 is about 193.2107731606.

The spelling of 7212636 in words is "seven million, two hundred twelve thousand, six hundred thirty-six".