39664441 has 4 divisors (see below), whose sum is σ = 39680500. Its totient is φ = 39648384.

The previous prime is 39664433. The next prime is 39664463. The reversal of 39664441 is 14446693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14446693 = 491 ⋅29423.

It can be written as a sum of positive squares in 2 ways, for example, as 5978025 + 33686416 = 2445^2 + 5804^2 .

It is a cyclic number.

It is not a de Polignac number, because 39664441 - 2³ = 39664433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39664441.

It is not an unprimeable number, because it can be changed into a prime (39661441) 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, 3456 + ... + 9553.

It is an arithmetic number, because the mean of its divisors is an integer number (9920125).

Almost surely, 2^39664441 is an apocalyptic number.

It is an amenable number.

39664441 is a deficient number, since it is larger than the sum of its proper divisors (16059).

39664441 is a wasteful number, since it uses less digits than its factorization.

39664441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16058.

The product of its digits is 62208, while the sum is 37.

The square root of 39664441 is about 6297.9711812615. The cubic root of 39664441 is about 341.0361728955.

The spelling of 39664441 in words is "thirty-nine million, six hundred sixty-four thousand, four hundred forty-one".