38109666 has 32 divisors (see below), whose sum is σ = 90897408. Its totient is φ = 10414800.

The previous prime is 38109661. The next prime is 38109677. The reversal of 38109666 is 66690183.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (38109661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18760 + ... + 20691.

It is an arithmetic number, because the mean of its divisors is an integer number (2840544).

Almost surely, 2^38109666 is an apocalyptic number.

38109666 is an abundant number, since it is smaller than the sum of its proper divisors (52787742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38109666 is a wasteful number, since it uses less digits than its factorization.

38109666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39486.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 38109666 is about 6173.3026817094. The cubic root of 38109666 is about 336.5206461930.

The spelling of 38109666 in words is "thirty-eight million, one hundred nine thousand, six hundred sixty-six".