423644542 has 4 divisors (see below), whose sum is σ = 635466816. Its totient is φ = 211822270.

The previous prime is 423644527. The next prime is 423644549. The reversal of 423644542 is 245446324.

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

It is a junction number, because it is equal to n+sod(n) for n = 423644498 and 423644507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423644549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105911134 + ... + 105911137.

It is an arithmetic number, because the mean of its divisors is an integer number (158866704).

Almost surely, 2^423644542 is an apocalyptic number.

423644542 is a deficient number, since it is larger than the sum of its proper divisors (211822274).

423644542 is a wasteful number, since it uses less digits than its factorization.

423644542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211822273.

The product of its digits is 92160, while the sum is 34.

The square root of 423644542 is about 20582.6271889669. The cubic root of 423644542 is about 751.0471547569.

The spelling of 423644542 in words is "four hundred twenty-three million, six hundred forty-four thousand, five hundred forty-two".