1286526228 has 96 divisors (see below), whose sum is σ = 3322830336. Its totient is φ = 384988032.

The previous prime is 1286526209. The next prime is 1286526251. The reversal of 1286526228 is 8226256821.

It is a self number, because there is not a number n which added to its sum of digits gives 1286526228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 866775 + ... + 868257.

It is an arithmetic number, because the mean of its divisors is an integer number (34612816).

Almost surely, 2^1286526228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1286526228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1661415168).

1286526228 is an abundant number, since it is smaller than the sum of its proper divisors (2036304108).

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

1286526228 is a wasteful number, since it uses less digits than its factorization.

1286526228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653 (or 1651 counting only the distinct ones).

The product of its digits is 184320, while the sum is 42.

The square root of 1286526228 is about 35868.1784873445. The cubic root of 1286526228 is about 1087.6092222708.

It can be divided in two parts, 12865 and 26228, that added together give a palindrome (39093).

The spelling of 1286526228 in words is "one billion, two hundred eighty-six million, five hundred twenty-six thousand, two hundred twenty-eight".