39802221 has 24 divisors (see below), whose sum is σ = 58874400. Its totient is φ = 25904736.

The previous prime is 39802211. The next prime is 39802223. The reversal of 39802221 is 12220893.

It is a happy number.

It is not a de Polignac number, because 39802221 - 2²¹ = 37705069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39802223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89626 + ... + 90068.

It is an arithmetic number, because the mean of its divisors is an integer number (2453100).

Almost surely, 2^39802221 is an apocalyptic number.

It is an amenable number.

39802221 is a deficient number, since it is larger than the sum of its proper divisors (19072179).

39802221 is a wasteful number, since it uses less digits than its factorization.

39802221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 662 counting only the distinct ones).

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

The square root of 39802221 is about 6308.9001418631. The cubic root of 39802221 is about 341.4305955491.

The spelling of 39802221 in words is "thirty-nine million, eight hundred two thousand, two hundred twenty-one".