38193665 has 4 divisors (see below), whose sum is σ = 45832404. Its totient is φ = 30554928.

The previous prime is 38193641. The next prime is 38193703. The reversal of 38193665 is 56639183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56639183 = 47 ⋅1205089.

It can be written as a sum of positive squares in 2 ways, for example, as 9560464 + 28633201 = 3092^2 + 5351^2 .

It is a cyclic number.

It is not a de Polignac number, because 38193665 - 2⁶ = 38193601 is a prime.

It is a super-2 number, since 2×38193665² = 2917512092264450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3819362 + ... + 3819371.

It is an arithmetic number, because the mean of its divisors is an integer number (11458101).

Almost surely, 2^38193665 is an apocalyptic number.

It is an amenable number.

38193665 is a deficient number, since it is larger than the sum of its proper divisors (7638739).

38193665 is an equidigital number, since it uses as much as digits as its factorization.

38193665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7638738.

The product of its digits is 116640, while the sum is 41.

The square root of 38193665 is about 6180.1023454309. The cubic root of 38193665 is about 336.7677108505.

The spelling of 38193665 in words is "thirty-eight million, one hundred ninety-three thousand, six hundred sixty-five".