212994388 has 6 divisors (see below), whose sum is σ = 372740186. Its totient is φ = 106497192.

The previous prime is 212994293. The next prime is 212994401. The reversal of 212994388 is 883499212.

It can be written as a sum of positive squares in only one way, i.e., 112954384 + 100040004 = 10628^2 + 10002^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26624295 + ... + 26624302.

Almost surely, 2^212994388 is an apocalyptic number.

It is an amenable number.

212994388 is a deficient number, since it is larger than the sum of its proper divisors (159745798).

212994388 is a wasteful number, since it uses less digits than its factorization.

212994388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53248601 (or 53248599 counting only the distinct ones).

The product of its digits is 248832, while the sum is 46.

The square root of 212994388 is about 14594.3272541080. The cubic root of 212994388 is about 597.2040169626.

The spelling of 212994388 in words is "two hundred twelve million, nine hundred ninety-four thousand, three hundred eighty-eight".