39972229 has 24 divisors (see below), whose sum is σ = 46884096. Its totient is φ = 33976800.

The previous prime is 39972217. The next prime is 39972259. The reversal of 39972229 is 92227993.

It is a happy number.

39972229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 39972229 - 2⁵ = 39972197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39972209) 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 23 ways as a sum of consecutive naturals, for example, 147364 + ... + 147634.

It is an arithmetic number, because the mean of its divisors is an integer number (1953504).

Almost surely, 2^39972229 is an apocalyptic number.

It is an amenable number.

39972229 is a deficient number, since it is larger than the sum of its proper divisors (6911867).

39972229 is a wasteful number, since it uses less digits than its factorization.

39972229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 358 counting only the distinct ones).

The product of its digits is 122472, while the sum is 43.

The square root of 39972229 is about 6322.3594488134. The cubic root of 39972229 is about 341.9160247752.

It can be divided in two parts, 3997 and 2229, that added together give a palindrome (6226).

The spelling of 39972229 in words is "thirty-nine million, nine hundred seventy-two thousand, two hundred twenty-nine".