38228909 has 2 divisors, whose sum is σ = 38228910. Its totient is φ = 38228908.

The previous prime is 38228899. The next prime is 38228929. The reversal of 38228909 is 90982283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37332100 + 896809 = 6110^2 + 947^2 .

It is a cyclic number.

It is not a de Polignac number, because 38228909 - 2²⁰ = 37180333 is a prime.

It is a super-2 number, since 2×38228909² = 2922898966660562, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38228929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19114454 + 19114455.

It is an arithmetic number, because the mean of its divisors is an integer number (19114455).

Almost surely, 2^38228909 is an apocalyptic number.

It is an amenable number.

38228909 is a deficient number, since it is larger than the sum of its proper divisors (1).

38228909 is an equidigital number, since it uses as much as digits as its factorization.

38228909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 38228909 is about 6182.9530970241. The cubic root of 38228909 is about 336.8712654781.

The spelling of 38228909 in words is "thirty-eight million, two hundred twenty-eight thousand, nine hundred nine".