423509838 has 32 divisors (see below), whose sum is σ = 875187456. Its totient is φ = 136539648.

The previous prime is 423509837. The next prime is 423509843. The reversal of 423509838 is 838905324.

It is a self number, because there is not a number n which added to its sum of digits gives 423509838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423509837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18606 + ... + 34542.

It is an arithmetic number, because the mean of its divisors is an integer number (27349608).

Almost surely, 2^423509838 is an apocalyptic number.

423509838 is an abundant number, since it is smaller than the sum of its proper divisors (451677618).

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

423509838 is a wasteful number, since it uses less digits than its factorization.

423509838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16088.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 423509838 is about 20579.3546546047. The cubic root of 423509838 is about 750.9675441632.

The spelling of 423509838 in words is "four hundred twenty-three million, five hundred nine thousand, eight hundred thirty-eight".