39022821 has 12 divisors (see below), whose sum is σ = 56727372. Its totient is φ = 25848576.

The previous prime is 39022811. The next prime is 39022829. The reversal of 39022821 is 12822093.

It is a happy number.

39022821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3381921 + 35640900 = 1839^2 + 5970^2 .

It is not a de Polignac number, because 39022821 - 2¹³ = 39014629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39022829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12396 + ... + 15221.

It is an arithmetic number, because the mean of its divisors is an integer number (4727281).

Almost surely, 2^39022821 is an apocalyptic number.

It is an amenable number.

39022821 is a deficient number, since it is larger than the sum of its proper divisors (17704551).

39022821 is a wasteful number, since it uses less digits than its factorization.

39022821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27780 (or 27777 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 39022821 is about 6246.8248734857. The cubic root of 39022821 is about 339.1872774177.

The spelling of 39022821 in words is "thirty-nine million, twenty-two thousand, eight hundred twenty-one".