1043664786 has 48 divisors (see below), whose sum is σ = 2337753600. Its totient is φ = 336156480.

The previous prime is 1043664773. The next prime is 1043664793. The reversal of 1043664786 is 6874663401.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 584451 + ... + 586233.

It is an arithmetic number, because the mean of its divisors is an integer number (48703200).

Almost surely, 2^1043664786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1043664786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1168876800).

1043664786 is an abundant number, since it is smaller than the sum of its proper divisors (1294088814).

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

1043664786 is a wasteful number, since it uses less digits than its factorization.

1043664786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871 (or 2868 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 1043664786 is about 32305.8011199227. The cubic root of 1043664786 is about 1014.3480767600.

The spelling of 1043664786 in words is "one billion, forty-three million, six hundred sixty-four thousand, seven hundred eighty-six".