1288775000 has 48 divisors (see below), whose sum is σ = 3020431680. Its totient is φ = 515500000.

The previous prime is 1288774969. The next prime is 1288775011. The reversal of 1288775000 is 5778821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 776 + ... + 50775.

It is an arithmetic number, because the mean of its divisors is an integer number (62925660).

Almost surely, 2^1288775000 is an apocalyptic number.

1288775000 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 1288775000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1510215840).

1288775000 is an abundant number, since it is smaller than the sum of its proper divisors (1731656680).

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

1288775000 is an frugal number, since it uses more digits than its factorization.

1288775000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51582 (or 51558 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 1288775000 is about 35899.5125315094. The cubic root of 1288775000 is about 1088.2425456771.

The spelling of 1288775000 in words is "one billion, two hundred eighty-eight million, seven hundred seventy-five thousand".