438538769 has 4 divisors (see below), whose sum is σ = 457605696. Its totient is φ = 419471844.

The previous prime is 438538757. The next prime is 438538831. The reversal of 438538769 is 967835834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438538769 is a prime.

It is a super-2 number, since 2×438538769² = 384632503832070722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 438538769.

It is not an unprimeable number, because it can be changed into a prime (438538729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9533429 + ... + 9533474.

It is an arithmetic number, because the mean of its divisors is an integer number (114401424).

Almost surely, 2^438538769 is an apocalyptic number.

It is an amenable number.

438538769 is a deficient number, since it is larger than the sum of its proper divisors (19066927).

438538769 is a wasteful number, since it uses less digits than its factorization.

438538769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19066926.

The product of its digits is 4354560, while the sum is 53.

The square root of 438538769 is about 20941.3172699331. The cubic root of 438538769 is about 759.7475898865.

The spelling of 438538769 in words is "four hundred thirty-eight million, five hundred thirty-eight thousand, seven hundred sixty-nine".