423957688 has 64 divisors (see below), whose sum is σ = 994705920. Its totient is φ = 164572800.

The previous prime is 423957629. The next prime is 423957691. The reversal of 423957688 is 886759324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190470 + ... + 192682.

It is an arithmetic number, because the mean of its divisors is an integer number (15542280).

Almost surely, 2^423957688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423957688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497352960).

423957688 is an abundant number, since it is smaller than the sum of its proper divisors (570748232).

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

423957688 is a wasteful number, since it uses less digits than its factorization.

423957688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548 (or 2544 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 52.

The square root of 423957688 is about 20590.2328301552. The cubic root of 423957688 is about 751.2321600816.

The spelling of 423957688 in words is "four hundred twenty-three million, nine hundred fifty-seven thousand, six hundred eighty-eight".