39471985 has 16 divisors (see below), whose sum is σ = 54239616. Its totient is φ = 27013248.

The previous prime is 39471983. The next prime is 39471989. The reversal of 39471985 is 58917493.

It is a happy number.

39471985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 39471985 - 2¹ = 39471983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39471983) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 26829 + ... + 28261.

It is an arithmetic number, because the mean of its divisors is an integer number (3389976).

Almost surely, 2^39471985 is an apocalyptic number.

39471985 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

39471985 is a deficient number, since it is larger than the sum of its proper divisors (14767631).

39471985 is a wasteful number, since it uses less digits than its factorization.

39471985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232.

The product of its digits is 272160, while the sum is 46.

The square root of 39471985 is about 6282.6733959358. The cubic root of 39471985 is about 340.4836973600.

The spelling of 39471985 in words is "thirty-nine million, four hundred seventy-one thousand, nine hundred eighty-five".