38656409 has 8 divisors (see below), whose sum is σ = 42216960. Its totient is φ = 35103600.

The previous prime is 38656403. The next prime is 38656417. The reversal of 38656409 is 90465683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38656409 - 2¹⁶ = 38590873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38656403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14987 + ... + 17375.

It is an arithmetic number, because the mean of its divisors is an integer number (5277120).

Almost surely, 2^38656409 is an apocalyptic number.

It is an amenable number.

38656409 is a deficient number, since it is larger than the sum of its proper divisors (3560551).

38656409 is a wasteful number, since it uses less digits than its factorization.

38656409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3871.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 38656409 is about 6217.4278443742. The cubic root of 38656409 is about 338.1223166420.

The spelling of 38656409 in words is "thirty-eight million, six hundred fifty-six thousand, four hundred nine".