38391229 has 4 divisors (see below), whose sum is σ = 40411840. Its totient is φ = 36370620.

The previous prime is 38391187. The next prime is 38391233. The reversal of 38391229 is 92219383.

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: 92219383 = 4093 ⋅22531.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38391229 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 (38391259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010277 + ... + 1010314.

It is an arithmetic number, because the mean of its divisors is an integer number (10102960).

Almost surely, 2^38391229 is an apocalyptic number.

It is an amenable number.

38391229 is a deficient number, since it is larger than the sum of its proper divisors (2020611).

38391229 is a wasteful number, since it uses less digits than its factorization.

38391229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020610.

The product of its digits is 23328, while the sum is 37.

The square root of 38391229 is about 6196.0656064958. The cubic root of 38391229 is about 337.3473775401.

The spelling of 38391229 in words is "thirty-eight million, three hundred ninety-one thousand, two hundred twenty-nine".