1538807085 has 16 divisors (see below), whose sum is σ = 2735657280. Its totient is φ = 820697040.

The previous prime is 1538807051. The next prime is 1538807087. The reversal of 1538807085 is 5807088351.

It is a happy number.

It is not a de Polignac number, because 1538807085 - 2⁶ = 1538807021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1538807085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538807087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5699151 + ... + 5699420.

It is an arithmetic number, because the mean of its divisors is an integer number (170978580).

Almost surely, 2^1538807085 is an apocalyptic number.

1538807085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1538807085 is a deficient number, since it is larger than the sum of its proper divisors (1196850195).

1538807085 is a wasteful number, since it uses less digits than its factorization.

1538807085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11398585 (or 11398579 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The square root of 1538807085 is about 39227.6316516814. The cubic root of 1538807085 is about 1154.5020960679.

The spelling of 1538807085 in words is "one billion, five hundred thirty-eight million, eight hundred seven thousand, eighty-five".