38145985 has 4 divisors (see below), whose sum is σ = 45775188. Its totient is φ = 30516784.

The previous prime is 38145953. The next prime is 38145997. The reversal of 38145985 is 58954183.

38145985 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58954183 = 1237 ⋅47659.

It can be written as a sum of positive squares in 2 ways, for example, as 15649936 + 22496049 = 3956^2 + 4743^2 .

It is a cyclic number.

It is not a de Polignac number, because 38145985 - 2⁵ = 38145953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3814594 + ... + 3814603.

It is an arithmetic number, because the mean of its divisors is an integer number (11443797).

Almost surely, 2^38145985 is an apocalyptic number.

It is an amenable number.

38145985 is a deficient number, since it is larger than the sum of its proper divisors (7629203).

38145985 is an equidigital number, since it uses as much as digits as its factorization.

38145985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7629202.

The product of its digits is 172800, while the sum is 43.

The square root of 38145985 is about 6176.2435994705. The cubic root of 38145985 is about 336.6275150803.

The spelling of 38145985 in words is "thirty-eight million, one hundred forty-five thousand, nine hundred eighty-five".