1288952250 has 64 divisors (see below), whose sum is σ = 3246946560. Its totient is φ = 340545600.

The previous prime is 1288952233. The next prime is 1288952263. The reversal of 1288952250 is 522598821.

It is a super-2 number, since 2×1288952250² = 3322795805560125000, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73867 + ... + 89633.

It is an arithmetic number, because the mean of its divisors is an integer number (50733540).

Almost surely, 2^1288952250 is an apocalyptic number.

1288952250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1288952250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1623473280).

1288952250 is an abundant number, since it is smaller than the sum of its proper divisors (1957994310).

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

1288952250 is a wasteful number, since it uses less digits than its factorization.

1288952250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15896 (or 15886 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 1288952250 is about 35901.9811431069. The cubic root of 1288952250 is about 1088.2924333996.

The spelling of 1288952250 in words is "one billion, two hundred eighty-eight million, nine hundred fifty-two thousand, two hundred fifty".