3968865 has 16 divisors (see below), whose sum is σ = 7056000. Its totient is φ = 2116656.

The previous prime is 3968863. The next prime is 3968869. The reversal of 3968865 is 5688693.

It is not a de Polignac number, because 3968865 - 2¹ = 3968863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3968865.

It is not an unprimeable number, because it can be changed into a prime (3968863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14565 + ... + 14834.

It is an arithmetic number, because the mean of its divisors is an integer number (441000).

Almost surely, 2^3968865 is an apocalyptic number.

It is an amenable number.

3968865 is a deficient number, since it is larger than the sum of its proper divisors (3087135).

3968865 is a wasteful number, since it uses less digits than its factorization.

3968865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29413 (or 29407 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 3968865 is about 1992.2010440716. The cubic root of 3968865 is about 158.3271675038.

It can be divided in two parts, 396 and 8865, that added together give a cube (9261 = 21³).

The spelling of 3968865 in words is "three million, nine hundred sixty-eight thousand, eight hundred sixty-five".