4218731438 has 8 divisors (see below), whose sum is σ = 6603231888. Its totient is φ = 2017654144.

The previous prime is 4218731437. The next prime is 4218731459. The reversal of 4218731438 is 8341378124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 4218731395 and 4218731404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4218731437) 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, 45855731 + ... + 45855822.

It is an arithmetic number, because the mean of its divisors is an integer number (825403986).

Almost surely, 2^4218731438 is an apocalyptic number.

4218731438 is a deficient number, since it is larger than the sum of its proper divisors (2384500450).

4218731438 is a wasteful number, since it uses less digits than its factorization.

4218731438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91711578.

The product of its digits is 129024, while the sum is 41.

The square root of 4218731438 is about 64951.7623933331. The cubic root of 4218731438 is about 1615.8236477061.

The spelling of 4218731438 in words is "four billion, two hundred eighteen million, seven hundred thirty-one thousand, four hundred thirty-eight".