38028209 has 2 divisors, whose sum is σ = 38028210. Its totient is φ = 38028208.

The previous prime is 38028191. The next prime is 38028241. The reversal of 38028209 is 90282083.

It is a happy number.

It is an a-pointer prime, because the next prime (38028241) can be obtained adding 38028209 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21827584 + 16200625 = 4672^2 + 4025^2 .

It is an emirp because it is prime and its reverse (90282083) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38028209 is a prime.

It is a super-2 number, since 2×38028209² = 2892289359495362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38028299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19014104 + 19014105.

It is an arithmetic number, because the mean of its divisors is an integer number (19014105).

Almost surely, 2^38028209 is an apocalyptic number.

It is an amenable number.

38028209 is a deficient number, since it is larger than the sum of its proper divisors (1).

38028209 is an equidigital number, since it uses as much as digits as its factorization.

38028209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 38028209 is about 6166.7016305315. The cubic root of 38028209 is about 336.2807112996.

The spelling of 38028209 in words is "thirty-eight million, twenty-eight thousand, two hundred nine".