423731928 has 32 divisors (see below), whose sum is σ = 1059856560. Its totient is φ = 141173760.

The previous prime is 423731911. The next prime is 423731929. The reversal of 423731928 is 829137324.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423731929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72076 + ... + 77732.

Almost surely, 2^423731928 is an apocalyptic number.

It is an amenable number.

423731928 is an abundant number, since it is smaller than the sum of its proper divisors (636124632).

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

423731928 is a wasteful number, since it uses less digits than its factorization.

423731928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8787 (or 8783 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 423731928 is about 20584.7498891777. The cubic root of 423731928 is about 751.0987912022.

The spelling of 423731928 in words is "four hundred twenty-three million, seven hundred thirty-one thousand, nine hundred twenty-eight".