39829221 has 12 divisors (see below), whose sum is σ = 57739500. Its totient is φ = 26456640.

The previous prime is 39829219. The next prime is 39829243. The reversal of 39829221 is 12292893.

39829221 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in 2 ways, for example, as 11088900 + 28740321 = 3330^2 + 5361^2 .

It is not a de Polignac number, because 39829221 - 2¹ = 39829219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39829211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5346 + ... + 10403.

It is an arithmetic number, because the mean of its divisors is an integer number (4811625).

Almost surely, 2^39829221 is an apocalyptic number.

It is an amenable number.

39829221 is a deficient number, since it is larger than the sum of its proper divisors (17910279).

39829221 is a wasteful number, since it uses less digits than its factorization.

39829221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16036 (or 16033 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 39829221 is about 6311.0396132492. The cubic root of 39829221 is about 341.5077817139.

It can be divided in two parts, 3982 and 9221, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 39829221 in words is "thirty-nine million, eight hundred twenty-nine thousand, two hundred twenty-one".