438396423 has 4 divisors (see below), whose sum is σ = 584528568. Its totient is φ = 292264280.

The previous prime is 438396419. The next prime is 438396433. The reversal of 438396423 is 324693834.

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 438396423 - 2² = 438396419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438396433) 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, 73066068 + ... + 73066073.

It is an arithmetic number, because the mean of its divisors is an integer number (146132142).

Almost surely, 2^438396423 is an apocalyptic number.

438396423 is a deficient number, since it is larger than the sum of its proper divisors (146132145).

438396423 is a wasteful number, since it uses less digits than its factorization.

438396423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146132144.

The product of its digits is 373248, while the sum is 42.

The square root of 438396423 is about 20937.9183062691. The cubic root of 438396423 is about 759.6653784293.

The spelling of 438396423 in words is "four hundred thirty-eight million, three hundred ninety-six thousand, four hundred twenty-three".