438728347 has 2 divisors, whose sum is σ = 438728348. Its totient is φ = 438728346.

The previous prime is 438728293. The next prime is 438728357. The reversal of 438728347 is 743827834.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 438728347 - 2⁷ = 438728219 is a prime.

It is a super-2 number, since 2×438728347² = 384965124922704818, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 438728297 and 438728306.

It is not a weakly prime, because it can be changed into another prime (438728357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219364173 + 219364174.

It is an arithmetic number, because the mean of its divisors is an integer number (219364174).

Almost surely, 2^438728347 is an apocalyptic number.

438728347 is a deficient number, since it is larger than the sum of its proper divisors (1).

438728347 is an equidigital number, since it uses as much as digits as its factorization.

438728347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 46.

The square root of 438728347 is about 20945.8431914306. The cubic root of 438728347 is about 759.8570524085.

The spelling of 438728347 in words is "four hundred thirty-eight million, seven hundred twenty-eight thousand, three hundred forty-seven".