1291088280 has 64 divisors (see below), whose sum is σ = 3907582560. Its totient is φ = 341239808.

The previous prime is 1291088269. The next prime is 1291088299. The reversal of 1291088280 is 828801921.

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

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, 34047 + ... + 61166.

Almost surely, 2^1291088280 is an apocalyptic number.

1291088280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1291088280 is an abundant number, since it is smaller than the sum of its proper divisors (2616494280).

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

1291088280 is a wasteful number, since it uses less digits than its factorization.

1291088280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95340 (or 95336 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 1291088280 is about 35931.7169086032. The cubic root of 1291088280 is about 1088.8932682657.

The spelling of 1291088280 in words is "one billion, two hundred ninety-one million, eighty-eight thousand, two hundred eighty".