423686520 has 96 divisors (see below), whose sum is σ = 1424498400. Its totient is φ = 109084416.

The previous prime is 423686513. The next prime is 423686551. The reversal of 423686520 is 25686324.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 9852 + ... + 30731.

It is an arithmetic number, because the mean of its divisors is an integer number (14838525).

Almost surely, 2^423686520 is an apocalyptic number.

423686520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423686520 is an abundant number, since it is smaller than the sum of its proper divisors (1000811880).

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

423686520 is a wasteful number, since it uses less digits than its factorization.

423686520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40629 (or 40622 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 423686520 is about 20583.6469071931. The cubic root of 423686520 is about 751.0719604710.

The spelling of 423686520 in words is "four hundred twenty-three million, six hundred eighty-six thousand, five hundred twenty".