423861985 has 8 divisors (see below), whose sum is σ = 508830696. Its totient is φ = 338958720.

The previous prime is 423861979. The next prime is 423862001. The reversal of 423861985 is 589168324.

It can be written as a sum of positive squares in 4 ways, for example, as 17073424 + 406788561 = 4132^2 + 20169^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-423861985 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756 + ... + 29125.

It is an arithmetic number, because the mean of its divisors is an integer number (63603837).

Almost surely, 2^423861985 is an apocalyptic number.

It is an amenable number.

423861985 is a deficient number, since it is larger than the sum of its proper divisors (84968711).

423861985 is a wasteful number, since it uses less digits than its factorization.

423861985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32723.

The product of its digits is 414720, while the sum is 46.

The square root of 423861985 is about 20587.9087087543. The cubic root of 423861985 is about 751.1756288255.

The spelling of 423861985 in words is "four hundred twenty-three million, eight hundred sixty-one thousand, nine hundred eighty-five".