1288042722 has 20 divisors (see below), whose sum is σ = 2886170166. Its totient is φ = 429347520.

The previous prime is 1288042703. The next prime is 1288042739. The reversal of 1288042722 is 2272408821.

It can be written as a sum of positive squares in only one way, i.e., 710169201 + 577873521 = 26649^2 + 24039^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3975279 + ... + 3975602.

Almost surely, 2^1288042722 is an apocalyptic number.

1288042722 is an abundant number, since it is smaller than the sum of its proper divisors (1598127444).

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

1288042722 is an equidigital number, since it uses as much as digits as its factorization.

1288042722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7950895 (or 7950886 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 1288042722 is about 35889.3120859122. The cubic root of 1288042722 is about 1088.0363946024.

The spelling of 1288042722 in words is "one billion, two hundred eighty-eight million, forty-two thousand, seven hundred twenty-two".