785438643 has 8 divisors (see below), whose sum is σ = 1142456256. Its totient is φ = 476023400.

The previous prime is 785438611. The next prime is 785438651. The reversal of 785438643 is 346834587.

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 785438643 - 2⁵ = 785438611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 785438592 and 785438601.

It is not an unprimeable number, because it can be changed into a prime (785438683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11900553 + ... + 11900618.

It is an arithmetic number, because the mean of its divisors is an integer number (142807032).

Almost surely, 2^785438643 is an apocalyptic number.

785438643 is a deficient number, since it is larger than the sum of its proper divisors (357017613).

785438643 is a wasteful number, since it uses less digits than its factorization.

785438643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23801185.

The product of its digits is 1935360, while the sum is 48.

The square root of 785438643 is about 28025.6782790355. The cubic root of 785438643 is about 922.6509249912.

The spelling of 785438643 in words is "seven hundred eighty-five million, four hundred thirty-eight thousand, six hundred forty-three".