39845985 has 8 divisors (see below), whose sum is σ = 63753600. Its totient is φ = 21251184.

The previous prime is 39845963. The next prime is 39845987. The reversal of 39845985 is 58954893.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 39845985 - 2⁶ = 39845921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39845987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1328185 + ... + 1328214.

It is an arithmetic number, because the mean of its divisors is an integer number (7969200).

Almost surely, 2^39845985 is an apocalyptic number.

It is an amenable number.

39845985 is a deficient number, since it is larger than the sum of its proper divisors (23907615).

39845985 is a wasteful number, since it uses less digits than its factorization.

39845985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656407.

The product of its digits is 1555200, while the sum is 51.

The square root of 39845985 is about 6312.3676223743. The cubic root of 39845985 is about 341.5556881946. Note that the first 3 decimals are identical.

The spelling of 39845985 in words is "thirty-nine million, eight hundred forty-five thousand, nine hundred eighty-five".