38640347 has 4 divisors (see below), whose sum is σ = 39015600. Its totient is φ = 38265096.

The previous prime is 38640331. The next prime is 38640361. The reversal of 38640347 is 74304683.

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

It is a cyclic number.

It is not a de Polignac number, because 38640347 - 2⁴ = 38640331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38640317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187472 + ... + 187677.

It is an arithmetic number, because the mean of its divisors is an integer number (9753900).

Almost surely, 2^38640347 is an apocalyptic number.

38640347 is a deficient number, since it is larger than the sum of its proper divisors (375253).

38640347 is a wasteful number, since it uses less digits than its factorization.

38640347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375252.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 38640347 is about 6216.1360184603. The cubic root of 38640347 is about 338.0754794494.

The spelling of 38640347 in words is "thirty-eight million, six hundred forty thousand, three hundred forty-seven".