38390209 has 24 divisors (see below), whose sum is σ = 46010592. Its totient is φ = 31749120.

The previous prime is 38390159. The next prime is 38390221. The reversal of 38390209 is 90209383.

It is not a de Polignac number, because 38390209 - 2⁷ = 38390081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38390269) 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 23 ways as a sum of consecutive naturals, for example, 198817 + ... + 199009.

It is an arithmetic number, because the mean of its divisors is an integer number (1917108).

Almost surely, 2^38390209 is an apocalyptic number.

It is an amenable number.

38390209 is a deficient number, since it is larger than the sum of its proper divisors (7620383).

38390209 is a wasteful number, since it uses less digits than its factorization.

38390209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 38390209 is about 6195.9832956521. The cubic root of 38390209 is about 337.3443899013.

The spelling of 38390209 in words is "thirty-eight million, three hundred ninety thousand, two hundred nine".