1288730352 has 80 divisors (see below), whose sum is σ = 4097515520. Its totient is φ = 339883776.

The previous prime is 1288730297. The next prime is 1288730381. The reversal of 1288730352 is 2530378821.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 1288730352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143152 + ... + 151887.

It is an arithmetic number, because the mean of its divisors is an integer number (51218944).

Almost surely, 2^1288730352 is an apocalyptic number.

1288730352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1288730352 is an abundant number, since it is smaller than the sum of its proper divisors (2808785168).

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

1288730352 is a wasteful number, since it uses less digits than its factorization.

1288730352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295070 (or 295064 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 1288730352 is about 35898.8906792397. The cubic root of 1288730352 is about 1088.2299785974.

The spelling of 1288730352 in words is "one billion, two hundred eighty-eight million, seven hundred thirty thousand, three hundred fifty-two".