424438643 has 4 divisors (see below), whose sum is σ = 449405640. Its totient is φ = 399471648.

The previous prime is 424438631. The next prime is 424438649. The reversal of 424438643 is 346834424.

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

It is a cyclic number.

It is not a de Polignac number, because 424438643 - 2⁴ = 424438627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 424438597 and 424438606.

It is not an unprimeable number, because it can be changed into a prime (424438649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12483473 + ... + 12483506.

It is an arithmetic number, because the mean of its divisors is an integer number (112351410).

Almost surely, 2^424438643 is an apocalyptic number.

424438643 is a deficient number, since it is larger than the sum of its proper divisors (24966997).

424438643 is a wasteful number, since it uses less digits than its factorization.

424438643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24966996.

The product of its digits is 221184, while the sum is 38.

The square root of 424438643 is about 20601.9087222519. The cubic root of 424438643 is about 751.5161289241.

The spelling of 424438643 in words is "four hundred twenty-four million, four hundred thirty-eight thousand, six hundred forty-three".