39644107 has 4 divisors (see below), whose sum is σ = 39671856. Its totient is φ = 39616360.

The previous prime is 39644093. The next prime is 39644123. The reversal of 39644107 is 70144693.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70144693 = 61 ⋅1149913.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39644107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39644147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11608 + ... + 14629.

It is an arithmetic number, because the mean of its divisors is an integer number (9917964).

Almost surely, 2^39644107 is an apocalyptic number.

39644107 is a deficient number, since it is larger than the sum of its proper divisors (27749).

39644107 is a wasteful number, since it uses less digits than its factorization.

39644107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27748.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 39644107 is about 6296.3566449178. The cubic root of 39644107 is about 340.9778854663.

The spelling of 39644107 in words is "thirty-nine million, six hundred forty-four thousand, one hundred seven".