39928841 has 2 divisors, whose sum is σ = 39928842. Its totient is φ = 39928840.

The previous prime is 39928817. The next prime is 39928843. The reversal of 39928841 is 14882993.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29203216 + 10725625 = 5404^2 + 3275^2 .

It is an emirp because it is prime and its reverse (14882993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39928841 - 2¹⁰ = 39927817 is a prime.

It is a Sophie Germain prime.

Together with 39928843, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39928792 and 39928801.

It is not a weakly prime, because it can be changed into another prime (39928843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19964420 + 19964421.

It is an arithmetic number, because the mean of its divisors is an integer number (19964421).

Almost surely, 2^39928841 is an apocalyptic number.

It is an amenable number.

39928841 is a deficient number, since it is larger than the sum of its proper divisors (1).

39928841 is an equidigital number, since it uses as much as digits as its factorization.

39928841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 44.

The square root of 39928841 is about 6318.9272032521. The cubic root of 39928841 is about 341.7922686601.

The spelling of 39928841 in words is "thirty-nine million, nine hundred twenty-eight thousand, eight hundred forty-one".