1438228165 has 16 divisors (see below), whose sum is σ = 1889738496. Its totient is φ = 1042113600.

The previous prime is 1438228159. The next prime is 1438228201. The reversal of 1438228165 is 5618228341.

It is not a de Polignac number, because 1438228165 - 2¹⁹ = 1437703877 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, 33342 + ... + 63151.

It is an arithmetic number, because the mean of its divisors is an integer number (118108656).

Almost surely, 2^1438228165 is an apocalyptic number.

It is an amenable number.

1438228165 is a deficient number, since it is larger than the sum of its proper divisors (451510331).

1438228165 is a wasteful number, since it uses less digits than its factorization.

1438228165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96780.

The product of its digits is 92160, while the sum is 40.

The square root of 1438228165 is about 37923.9787601459. The cubic root of 1438228165 is about 1128.7798888508.

The spelling of 1438228165 in words is "one billion, four hundred thirty-eight million, two hundred twenty-eight thousand, one hundred sixty-five".