38643229 has 4 divisors (see below), whose sum is σ = 38690784. Its totient is φ = 38595676.

The previous prime is 38643221. The next prime is 38643233. The reversal of 38643229 is 92234683.

38643229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92234683 = 19 ⋅4854457.

It is a cyclic number.

It is not a de Polignac number, because 38643229 - 2³ = 38643221 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 (38643221) 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 3 ways as a sum of consecutive naturals, for example, 22537 + ... + 24190.

It is an arithmetic number, because the mean of its divisors is an integer number (9672696).

Almost surely, 2^38643229 is an apocalyptic number.

It is an amenable number.

38643229 is a deficient number, since it is larger than the sum of its proper divisors (47555).

38643229 is an equidigital number, since it uses as much as digits as its factorization.

38643229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47554.

The product of its digits is 62208, while the sum is 37.

The square root of 38643229 is about 6216.3678301722. The cubic root of 38643229 is about 338.0838843887.

The spelling of 38643229 in words is "thirty-eight million, six hundred forty-three thousand, two hundred twenty-nine".