39842217 has 6 divisors (see below), whose sum is σ = 57549882. Its totient is φ = 26561472.

The previous prime is 39842213. The next prime is 39842219. The reversal of 39842217 is 71224893.

It can be written as a sum of positive squares in only one way, i.e., 24561936 + 15280281 = 4956^2 + 3909^2 .

It is not a de Polignac number, because 39842217 - 2² = 39842213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39842213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2213448 + ... + 2213465.

It is an arithmetic number, because the mean of its divisors is an integer number (9591647).

Almost surely, 2^39842217 is an apocalyptic number.

It is an amenable number.

39842217 is a deficient number, since it is larger than the sum of its proper divisors (17707665).

39842217 is a wasteful number, since it uses less digits than its factorization.

39842217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4426919 (or 4426916 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 39842217 is about 6312.0691536136. The cubic root of 39842217 is about 341.5449215523.

The spelling of 39842217 in words is "thirty-nine million, eight hundred forty-two thousand, two hundred seventeen".