423706240 has 128 divisors (see below), whose sum is σ = 1077915600. Its totient is φ = 158957568.

The previous prime is 423706229. The next prime is 423706273. The reversal of 423706240 is 42607324.

It can be written as a sum of positive squares in 8 ways, for example, as 153958464 + 269747776 = 12408^2 + 16424^2 .

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 423706199 and 423706208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 686412 + ... + 687028.

Almost surely, 2^423706240 is an apocalyptic number.

423706240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423706240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (538957800).

423706240 is an abundant number, since it is smaller than the sum of its proper divisors (654209360).

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

423706240 is a wasteful number, since it uses less digits than its factorization.

423706240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 423706240 is about 20584.1259226619. The cubic root of 423706240 is about 751.0836128827.

The spelling of 423706240 in words is "four hundred twenty-three million, seven hundred six thousand, two hundred forty".