3858665 has 8 divisors (see below), whose sum is σ = 4718088. Its totient is φ = 3028480.

The previous prime is 3858629. The next prime is 3858667. The reversal of 3858665 is 5668583.

It can be written as a sum of positive squares in 4 ways, for example, as 1459264 + 2399401 = 1208^2 + 1549^2 .

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

It is not a de Polignac number, because 3858665 - 2¹⁰ = 3857641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3858667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7016 + ... + 7545.

It is an arithmetic number, because the mean of its divisors is an integer number (589761).

Almost surely, 2^3858665 is an apocalyptic number.

It is an amenable number.

3858665 is a deficient number, since it is larger than the sum of its proper divisors (859423).

3858665 is a wasteful number, since it uses less digits than its factorization.

3858665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14619.

The product of its digits is 172800, while the sum is 41.

The square root of 3858665 is about 1964.3484925033. The cubic root of 3858665 is about 156.8480144373.

The spelling of 3858665 in words is "three million, eight hundred fifty-eight thousand, six hundred sixty-five".