1288522392 has 64 divisors (see below), whose sum is σ = 3425923200. Its totient is φ = 402693120.

The previous prime is 1288522381. The next prime is 1288522397. The reversal of 1288522392 is 2932258821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288522397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29667 + ... + 58797.

It is an arithmetic number, because the mean of its divisors is an integer number (53530050).

Almost surely, 2^1288522392 is an apocalyptic number.

1288522392 is a gapful number since it is divisible by the number (12) 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 1288522392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1712961600).

1288522392 is an abundant number, since it is smaller than the sum of its proper divisors (2137400808).

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

1288522392 is a wasteful number, since it uses less digits than its factorization.

1288522392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29256 (or 29252 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 1288522392 is about 35895.9940940490. The cubic root of 1288522392 is about 1088.1714402383.

The spelling of 1288522392 in words is "one billion, two hundred eighty-eight million, five hundred twenty-two thousand, three hundred ninety-two".