38162209 has 4 divisors (see below), whose sum is σ = 39393280. Its totient is φ = 36931140.

The previous prime is 38162197. The next prime is 38162219. The reversal of 38162209 is 90226183.

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: 90226183 = 811 ⋅111253.

It is a cyclic number.

It is not a de Polignac number, because 38162209 - 2⁵ = 38162177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 1231039 = 38162209 / (3 + 8 + 1 + 6 + 2 + 2 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38162219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615489 + ... + 615550.

It is an arithmetic number, because the mean of its divisors is an integer number (9848320).

Almost surely, 2^38162209 is an apocalyptic number.

It is an amenable number.

38162209 is a deficient number, since it is larger than the sum of its proper divisors (1231071).

38162209 is a wasteful number, since it uses less digits than its factorization.

38162209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231070.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 38162209 is about 6177.5568795439. The cubic root of 38162209 is about 336.6752323845.

The spelling of 38162209 in words is "thirty-eight million, one hundred sixty-two thousand, two hundred nine".