212787268 has 12 divisors (see below), whose sum is σ = 385218540. Its totient is φ = 102724832.

The previous prime is 212787247. The next prime is 212787271. The reversal of 212787268 is 862787212.

It can be written as a sum of positive squares in 2 ways, for example, as 36216324 + 176570944 = 6018^2 + 13288^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 917071 + ... + 917302.

It is an arithmetic number, because the mean of its divisors is an integer number (32101545).

Almost surely, 2^212787268 is an apocalyptic number.

It is an amenable number.

212787268 is a deficient number, since it is larger than the sum of its proper divisors (172431272).

212787268 is a wasteful number, since it uses less digits than its factorization.

212787268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834406 (or 1834404 counting only the distinct ones).

The product of its digits is 150528, while the sum is 43.

The square root of 212787268 is about 14587.2296204591. The cubic root of 212787268 is about 597.0103764749.

The spelling of 212787268 in words is "two hundred twelve million, seven hundred eighty-seven thousand, two hundred sixty-eight".