8723438 has 4 divisors (see below), whose sum is σ = 13085160. Its totient is φ = 4361718.

The previous prime is 8723437. The next prime is 8723441. The reversal of 8723438 is 8343278.

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

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 8723398 and 8723407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8723437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2180858 + ... + 2180861.

It is an arithmetic number, because the mean of its divisors is an integer number (3271290).

Almost surely, 2^8723438 is an apocalyptic number.

8723438 is a deficient number, since it is larger than the sum of its proper divisors (4361722).

8723438 is a wasteful number, since it uses less digits than its factorization.

8723438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4361721.

The product of its digits is 32256, while the sum is 35.

The square root of 8723438 is about 2953.5466815339. The cubic root of 8723438 is about 205.8555401561.

The spelling of 8723438 in words is "eight million, seven hundred twenty-three thousand, four hundred thirty-eight".