1286220000 has 480 divisors, whose sum is σ = 4860469152. Its totient is φ = 294912000.

The previous prime is 1286219993. The next prime is 1286220043. The reversal of 1286220000 is 226821.

It is a tau number, because it is divible by the number of its divisors (480).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 13259952 + ... + 13260048.

Almost surely, 2^1286220000 is an apocalyptic number.

1286220000 is a gapful number since it is divisible by the number (10) 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 1286220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2430234576).

1286220000 is an abundant number, since it is smaller than the sum of its proper divisors (3574249152).

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

1286220000 is a wasteful number, since it uses less digits than its factorization.

1286220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1286220000 is about 35863.9094355314. The cubic root of 1286220000 is about 1087.5229219637.

Adding to 1286220000 its reverse (226821), we get a palindrome (1286446821).

The spelling of 1286220000 in words is "one billion, two hundred eighty-six million, two hundred twenty thousand".