423909686 has 32 divisors (see below), whose sum is σ = 669907200. Its totient is φ = 200931840.

The previous prime is 423909683. The next prime is 423909719. The reversal of 423909686 is 686909324.

It is a self number, because there is not a number n which added to its sum of digits gives 423909686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423909683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1036250 + ... + 1036658.

It is an arithmetic number, because the mean of its divisors is an integer number (20934600).

Almost surely, 2^423909686 is an apocalyptic number.

423909686 is a deficient number, since it is larger than the sum of its proper divisors (245997514).

423909686 is a wasteful number, since it uses less digits than its factorization.

423909686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744.

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 423909686 is about 20589.0671473965. The cubic root of 423909686 is about 751.2038066176.

The spelling of 423909686 in words is "four hundred twenty-three million, nine hundred nine thousand, six hundred eighty-six".