423857860 has 12 divisors (see below), whose sum is σ = 890101548. Its totient is φ = 169543136.

The previous prime is 423857849. The next prime is 423857867. The reversal of 423857860 is 68758324.

It can be written as a sum of positive squares in 2 ways, for example, as 260887104 + 162970756 = 16152^2 + 12766^2 .

It is not an unprimeable number, because it can be changed into a prime (423857867) 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 3 ways as a sum of consecutive naturals, for example, 10596427 + ... + 10596466.

It is an arithmetic number, because the mean of its divisors is an integer number (74175129).

Almost surely, 2^423857860 is an apocalyptic number.

It is an amenable number.

423857860 is an abundant number, since it is smaller than the sum of its proper divisors (466243688).

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

423857860 is a wasteful number, since it uses less digits than its factorization.

423857860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21192902 (or 21192900 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 423857860 is about 20587.8085283500. The cubic root of 423857860 is about 751.1731920186.

The spelling of 423857860 in words is "four hundred twenty-three million, eight hundred fifty-seven thousand, eight hundred sixty".