1291629288 has 16 divisors (see below), whose sum is σ = 3229073280. Its totient is φ = 430543088.

The previous prime is 1291629277. The next prime is 1291629301. The reversal of 1291629288 is 8829261921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26908920 + ... + 26908967.

It is an arithmetic number, because the mean of its divisors is an integer number (201817080).

Almost surely, 2^1291629288 is an apocalyptic number.

It is an amenable number.

1291629288 is an abundant number, since it is smaller than the sum of its proper divisors (1937443992).

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

1291629288 is a wasteful number, since it uses less digits than its factorization.

1291629288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53817896 (or 53817892 counting only the distinct ones).

The product of its digits is 248832, while the sum is 48.

The square root of 1291629288 is about 35939.2443994027. The cubic root of 1291629288 is about 1089.0453409301.

The spelling of 1291629288 in words is "one billion, two hundred ninety-one million, six hundred twenty-nine thousand, two hundred eighty-eight".