1438148169 has 8 divisors (see below), whose sum is σ = 2130589920. Its totient is φ = 958765428.

The previous prime is 1438148161. The next prime is 1438148177. The reversal of 1438148169 is 9618418341.

It is an interprime number because it is at equal distance from previous prime (1438148161) and next prime (1438148177).

It is not a de Polignac number, because 1438148169 - 2³ = 1438148161 is a prime.

It is a super-2 number, since 2×1438148169² = 4136540311996105122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1438148161) 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, 26632347 + ... + 26632400.

It is an arithmetic number, because the mean of its divisors is an integer number (266323740).

Almost surely, 2^1438148169 is an apocalyptic number.

It is an amenable number.

1438148169 is a deficient number, since it is larger than the sum of its proper divisors (692441751).

1438148169 is an equidigital number, since it uses as much as digits as its factorization.

1438148169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53264756 (or 53264750 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 1438148169 is about 37922.9240565650. The cubic root of 1438148169 is about 1128.7589604260.

The spelling of 1438148169 in words is "one billion, four hundred thirty-eight million, one hundred forty-eight thousand, one hundred sixty-nine".