1044778993 has 8 divisors (see below), whose sum is σ = 1061337600. Its totient is φ = 1028281248.

The previous prime is 1044778967. The next prime is 1044779003. The reversal of 1044778993 is 3998774401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1044778993 - 2⁵ = 1044778961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1044778993.

It is not an unprimeable number, because it can be changed into a prime (1044778093) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20028 + ... + 49906.

It is an arithmetic number, because the mean of its divisors is an integer number (132667200).

Almost surely, 2^1044778993 is an apocalyptic number.

It is an amenable number.

1044778993 is a deficient number, since it is larger than the sum of its proper divisors (16558607).

1044778993 is an equidigital number, since it uses as much as digits as its factorization.

1044778993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30431.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 1044778993 is about 32323.0412090199. The cubic root of 1044778993 is about 1014.7089179631.

The spelling of 1044778993 in words is "one billion, forty-four million, seven hundred seventy-eight thousand, nine hundred ninety-three".