1288550280 has 64 divisors (see below), whose sum is σ = 3869481600. Its totient is φ = 343272960.

The previous prime is 1288550279. The next prime is 1288550287. The reversal of 1288550280 is 820558821.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1288550287) 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, 130725 + ... + 140235.

It is an arithmetic number, because the mean of its divisors is an integer number (60460650).

Almost surely, 2^1288550280 is an apocalyptic number.

1288550280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1288550280 is an abundant number, since it is smaller than the sum of its proper divisors (2580931320).

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

1288550280 is a wasteful number, since it uses less digits than its factorization.

1288550280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10654 (or 10650 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 39.

The square root of 1288550280 is about 35896.3825475493. The cubic root of 1288550280 is about 1088.1792907567.

The spelling of 1288550280 in words is "one billion, two hundred eighty-eight million, five hundred fifty thousand, two hundred eighty".