428783865907 has 4 divisors (see below), whose sum is σ = 428789331640. Its totient is φ = 428778400176.

The previous prime is 428783865869. The next prime is 428783865949. The reversal of 428783865907 is 709568387824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428783865907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428783865407) 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 3 ways as a sum of consecutive naturals, for example, 2613453 + ... + 2772670.

It is an arithmetic number, because the mean of its divisors is an integer number (107197332910).

Almost surely, 2^428783865907 is an apocalyptic number.

428783865907 is a deficient number, since it is larger than the sum of its proper divisors (5465733).

428783865907 is an equidigital number, since it uses as much as digits as its factorization.

428783865907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5465732.

The product of its (nonzero) digits is 162570240, while the sum is 67.

The spelling of 428783865907 in words is "four hundred twenty-eight billion, seven hundred eighty-three million, eight hundred sixty-five thousand, nine hundred seven".