3864739 has 4 divisors (see below), whose sum is σ = 3989440. Its totient is φ = 3740040.

The previous prime is 3864719. The next prime is 3864767. The reversal of 3864739 is 9374683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9374683 = 1471 ⋅6373.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3864739 is a prime.

It is an Ulam number.

It is a Duffinian number.

3864739 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3864709) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 62304 + ... + 62365.

It is an arithmetic number, because the mean of its divisors is an integer number (997360).

Almost surely, 2^3864739 is an apocalyptic number.

3864739 is a deficient number, since it is larger than the sum of its proper divisors (124701).

3864739 is a wasteful number, since it uses less digits than its factorization.

3864739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124700.

The product of its digits is 108864, while the sum is 40.

The square root of 3864739 is about 1965.8939442401. The cubic root of 3864739 is about 156.9302704672.

The spelling of 3864739 in words is "three million, eight hundred sixty-four thousand, seven hundred thirty-nine".