3840247 has 4 divisors (see below), whose sum is σ = 3868416. Its totient is φ = 3812080.

The previous prime is 3840227. The next prime is 3840253. The reversal of 3840247 is 7420483.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3840247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3840227) 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, 13879 + ... + 14152.

It is an arithmetic number, because the mean of its divisors is an integer number (967104).

Almost surely, 2^3840247 is an apocalyptic number.

3840247 is a deficient number, since it is larger than the sum of its proper divisors (28169).

3840247 is a wasteful number, since it uses less digits than its factorization.

3840247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28168.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 3840247 is about 1959.6548165430. The cubic root of 3840247 is about 156.5980631175.

The spelling of 3840247 in words is "three million, eight hundred forty thousand, two hundred forty-seven".