158738985 has 24 divisors (see below), whose sum is σ = 287112384. Its totient is φ = 80979360.

The previous prime is 158738971. The next prime is 158738999. The reversal of 158738985 is 589837851.

It is an interprime number because it is at equal distance from previous prime (158738971) and next prime (158738999).

It is not a de Polignac number, because 158738985 - 2¹¹ = 158736937 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75651 + ... + 77720.

It is an arithmetic number, because the mean of its divisors is an integer number (11963016).

Almost surely, 2^158738985 is an apocalyptic number.

158738985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158738985 is a deficient number, since it is larger than the sum of its proper divisors (128373399).

158738985 is a wasteful number, since it uses less digits than its factorization.

158738985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153405 (or 153402 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 54.

The square root of 158738985 is about 12599.1660438300. The cubic root of 158738985 is about 541.4535427694.

The spelling of 158738985 in words is "one hundred fifty-eight million, seven hundred thirty-eight thousand, nine hundred eighty-five".