438538165 has 16 divisors (see below), whose sum is σ = 577423728. Its totient is φ = 317730816.

The previous prime is 438538151. The next prime is 438538181. The reversal of 438538165 is 561835834.

It can be written as a sum of positive squares in 8 ways, for example, as 1602756 + 436935409 = 1266^2 + 20903^2 .

It is not a de Polignac number, because 438538165 - 2¹⁷ = 438407093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60204 + ... + 67093.

It is an arithmetic number, because the mean of its divisors is an integer number (36088983).

Almost surely, 2^438538165 is an apocalyptic number.

It is an amenable number.

438538165 is a deficient number, since it is larger than the sum of its proper divisors (138885563).

438538165 is a wasteful number, since it uses less digits than its factorization.

438538165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127368.

The product of its digits is 345600, while the sum is 43.

The square root of 438538165 is about 20941.3028486768. The cubic root of 438538165 is about 759.7472410859.

The spelling of 438538165 in words is "four hundred thirty-eight million, five hundred thirty-eight thousand, one hundred sixty-five".