38640305 has 8 divisors (see below), whose sum is σ = 50583744. Its totient is φ = 28102000.

The previous prime is 38640289. The next prime is 38640311. The reversal of 38640305 is 50304683.

38640305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 38640305 - 2⁴ = 38640289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351221 + ... + 351330.

It is an arithmetic number, because the mean of its divisors is an integer number (6322968).

Almost surely, 2^38640305 is an apocalyptic number.

It is an amenable number.

38640305 is a deficient number, since it is larger than the sum of its proper divisors (11943439).

38640305 is a wasteful number, since it uses less digits than its factorization.

38640305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702567.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 38640305 is about 6216.1326401550. The cubic root of 38640305 is about 338.0753569594.

Adding to 38640305 its reverse (50304683), we get a palindrome (88944988).

The spelling of 38640305 in words is "thirty-eight million, six hundred forty thousand, three hundred five".