438340113 has 8 divisors (see below), whose sum is σ = 649392800. Its totient is φ = 292226724.

The previous prime is 438340109. The next prime is 438340117. The reversal of 438340113 is 311043834.

It is an interprime number because it is at equal distance from previous prime (438340109) and next prime (438340117).

It is not a de Polignac number, because 438340113 - 2² = 438340109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 16234819 = 438340113 / (4 + 3 + 8 + 3 + 4 + 0 + 1 + 1 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438340117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8117383 + ... + 8117436.

It is an arithmetic number, because the mean of its divisors is an integer number (81174100).

Almost surely, 2^438340113 is an apocalyptic number.

It is an amenable number.

438340113 is a deficient number, since it is larger than the sum of its proper divisors (211052687).

438340113 is a wasteful number, since it uses less digits than its factorization.

438340113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16234828 (or 16234822 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 438340113 is about 20936.5735735339. The cubic root of 438340113 is about 759.6328518644.

Adding to 438340113 its reverse (311043834), we get a palindrome (749383947).

The spelling of 438340113 in words is "four hundred thirty-eight million, three hundred forty thousand, one hundred thirteen".