1044008691 has 12 divisors (see below), whose sum is σ = 1530062856. Its totient is φ = 632732320.

The previous prime is 1044008677. The next prime is 1044008701. The reversal of 1044008691 is 1968004401.

It is not a de Polignac number, because 1044008691 - 2⁵ = 1044008659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1044008191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1437666 + ... + 1438391.

It is an arithmetic number, because the mean of its divisors is an integer number (127505238).

Almost surely, 2^1044008691 is an apocalyptic number.

1044008691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1044008691 is a deficient number, since it is larger than the sum of its proper divisors (486054165).

1044008691 is a wasteful number, since it uses less digits than its factorization.

1044008691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876082 (or 2876071 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1044008691 is about 32311.1233323758. The cubic root of 1044008691 is about 1014.4594794092.

The spelling of 1044008691 in words is "one billion, forty-four million, eight thousand, six hundred ninety-one".