1291949832 has 16 divisors (see below), whose sum is σ = 3229874640. Its totient is φ = 430649936.

The previous prime is 1291949819. The next prime is 1291949849. The reversal of 1291949832 is 2389491921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26915598 + ... + 26915645.

It is an arithmetic number, because the mean of its divisors is an integer number (201867165).

Almost surely, 2^1291949832 is an apocalyptic number.

1291949832 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1291949832 is an abundant number, since it is smaller than the sum of its proper divisors (1937924808).

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

1291949832 is a wasteful number, since it uses less digits than its factorization.

1291949832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53831252 (or 53831248 counting only the distinct ones).

The product of its digits is 279936, while the sum is 48.

The square root of 1291949832 is about 35943.7036489007. The cubic root of 1291949832 is about 1089.1354230405.

The spelling of 1291949832 in words is "one billion, two hundred ninety-one million, nine hundred forty-nine thousand, eight hundred thirty-two".