39935145 has 16 divisors (see below), whose sum is σ = 63987840. Its totient is φ = 21268224.

The previous prime is 39935143. The next prime is 39935177. The reversal of 39935145 is 54153993.

It is not a de Polignac number, because 39935145 - 2¹ = 39935143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39935141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12337 + ... + 15233.

It is an arithmetic number, because the mean of its divisors is an integer number (3999240).

Almost surely, 2^39935145 is an apocalyptic number.

It is an amenable number.

39935145 is a deficient number, since it is larger than the sum of its proper divisors (24052695).

39935145 is a wasteful number, since it uses less digits than its factorization.

39935145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824.

The product of its digits is 72900, while the sum is 39.

The square root of 39935145 is about 6319.4260024151. The cubic root of 39935145 is about 341.8102552001.

The spelling of 39935145 in words is "thirty-nine million, nine hundred thirty-five thousand, one hundred forty-five".