1538448085 has 4 divisors (see below), whose sum is σ = 1846137708. Its totient is φ = 1230758464.

The previous prime is 1538448073. The next prime is 1538448089. The reversal of 1538448085 is 5808448351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5808448351 = 56569 ⋅102679.

It can be written as a sum of positive squares in 2 ways, for example, as 551357361 + 987090724 = 23481^2 + 31418^2 .

It is a cyclic number.

It is not a de Polignac number, because 1538448085 - 2¹⁷ = 1538317013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538448089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153844804 + ... + 153844813.

It is an arithmetic number, because the mean of its divisors is an integer number (461534427).

Almost surely, 2^1538448085 is an apocalyptic number.

It is an amenable number.

1538448085 is a deficient number, since it is larger than the sum of its proper divisors (307689623).

1538448085 is an equidigital number, since it uses as much as digits as its factorization.

1538448085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307689622.

The product of its (nonzero) digits is 614400, while the sum is 46.

The square root of 1538448085 is about 39223.0555286046. The cubic root of 1538448085 is about 1154.4123082290.

The spelling of 1538448085 in words is "one billion, five hundred thirty-eight million, four hundred forty-eight thousand, eighty-five".