423508538 has 4 divisors (see below), whose sum is σ = 635262810. Its totient is φ = 211754268.

The previous prime is 423508507. The next prime is 423508559. The reversal of 423508538 is 835805324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 390181009 + 33327529 = 19753^2 + 5773^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105877133 + ... + 105877136.

Almost surely, 2^423508538 is an apocalyptic number.

423508538 is a deficient number, since it is larger than the sum of its proper divisors (211754272).

423508538 is a wasteful number, since it uses less digits than its factorization.

423508538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211754271.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 423508538 is about 20579.3230695278. The cubic root of 423508538 is about 750.9667757758.

The spelling of 423508538 in words is "four hundred twenty-three million, five hundred eight thousand, five hundred thirty-eight".