38680321 has 4 divisors (see below), whose sum is σ = 40955652. Its totient is φ = 36404992.

The previous prime is 38680307. The next prime is 38680331. The reversal of 38680321 is 12308683.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18105025 + 20575296 = 4255^2 + 4536^2 .

It is a cyclic number.

It is not a de Polignac number, because 38680321 - 2¹³ = 38672129 is a prime.

It is a Smith number, since the sum of its digits (31) 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 (38680331) 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 3 ways as a sum of consecutive naturals, for example, 1137640 + ... + 1137673.

It is an arithmetic number, because the mean of its divisors is an integer number (10238913).

Almost surely, 2^38680321 is an apocalyptic number.

It is an amenable number.

38680321 is a deficient number, since it is larger than the sum of its proper divisors (2275331).

38680321 is a wasteful number, since it uses less digits than its factorization.

38680321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275330.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 38680321 is about 6219.3505287932. The cubic root of 38680321 is about 338.1920206015.

The spelling of 38680321 in words is "thirty-eight million, six hundred eighty thousand, three hundred twenty-one".