38916009 has 48 divisors (see below), whose sum is σ = 68402880. Its totient is φ = 21012480.

The previous prime is 38915993. The next prime is 38916013. The reversal of 38916009 is 90061983.

It is not a de Polignac number, because 38916009 - 2⁴ = 38915993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38916019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31369 + ... + 32585.

It is an arithmetic number, because the mean of its divisors is an integer number (1425060).

Almost surely, 2^38916009 is an apocalyptic number.

It is an amenable number.

38916009 is a deficient number, since it is larger than the sum of its proper divisors (29486871).

38916009 is a wasteful number, since it uses less digits than its factorization.

38916009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 38916009 is about 6238.2697120275. The cubic root of 38916009 is about 338.8775238248.

The spelling of 38916009 in words is "thirty-eight million, nine hundred sixteen thousand, nine".