1286222868 has 192 divisors, whose sum is σ = 3971358720. Its totient is φ = 352370304.

The previous prime is 1286222867. The next prime is 1286222869. The reversal of 1286222868 is 8682226821.

1286222868 is a `hidden beast` number, since 12 + 8 + 622 + 2 + 8 + 6 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (1286222867) and next prime (1286222869).

It is a super-2 number, since 2×1286222868² = 3308738532332290848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286222867) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1882855 + ... + 1883537.

It is an arithmetic number, because the mean of its divisors is an integer number (20684160).

Almost surely, 2^1286222868 is an apocalyptic number.

1286222868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1286222868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1985679360).

1286222868 is an abundant number, since it is smaller than the sum of its proper divisors (2685135852).

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

1286222868 is a wasteful number, since it uses less digits than its factorization.

1286222868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 795 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 1286222868 is about 35863.9494199956. The cubic root of 1286222868 is about 1087.5237302788.

The spelling of 1286222868 in words is "one billion, two hundred eighty-six million, two hundred twenty-two thousand, eight hundred sixty-eight".