2212987644 has 72 divisors (see below), whose sum is σ = 6400124640. Its totient is φ = 631585152.

The previous prime is 2212987639. The next prime is 2212987661. The reversal of 2212987644 is 4467892122.

It is a self number, because there is not a number n which added to its sum of digits gives 2212987644.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250942 + ... + 259610.

It is an arithmetic number, because the mean of its divisors is an integer number (88890620).

Almost surely, 2^2212987644 is an apocalyptic number.

It is an amenable number.

2212987644 is an abundant number, since it is smaller than the sum of its proper divisors (4187136996).

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

2212987644 is a wasteful number, since it uses less digits than its factorization.

2212987644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9699 (or 9694 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 2212987644 is about 47042.4026172133. The cubic root of 2212987644 is about 1303.1457631459.

The spelling of 2212987644 in words is "two billion, two hundred twelve million, nine hundred eighty-seven thousand, six hundred forty-four".