212644684 has 12 divisors (see below), whose sum is σ = 425289424. Its totient is φ = 91133424.

The previous prime is 212644681. The next prime is 212644697. The reversal of 212644684 is 486446212.

It is a happy number.

212644684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

212644684 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (212644681) 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, 3797199 + ... + 3797254.

Almost surely, 2^212644684 is an apocalyptic number.

It is an amenable number.

212644684 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.

212644684 is a wasteful number, since it uses less digits than its factorization.

212644684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7594464 (or 7594462 counting only the distinct ones).

The product of its digits is 73728, while the sum is 37.

The square root of 212644684 is about 14582.3415129395. The cubic root of 212644684 is about 596.8769989023.

The spelling of 212644684 in words is "two hundred twelve million, six hundred forty-four thousand, six hundred eighty-four".