423203928 has 128 divisors (see below), whose sum is σ = 1255787520. Its totient is φ = 116328960.

The previous prime is 423203923. The next prime is 423203941. The reversal of 423203928 is 829302324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423203923) 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 31 ways as a sum of consecutive naturals, for example, 639918 + ... + 640578.

It is an arithmetic number, because the mean of its divisors is an integer number (9810840).

Almost surely, 2^423203928 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 423203928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (627893760).

423203928 is an abundant number, since it is smaller than the sum of its proper divisors (832583592).

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

423203928 is a wasteful number, since it uses less digits than its factorization.

423203928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817 (or 813 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 423203928 is about 20571.9208631571. The cubic root of 423203928 is about 750.7866874309.

The spelling of 423203928 in words is "four hundred twenty-three million, two hundred three thousand, nine hundred twenty-eight".