3856965 has 32 divisors (see below), whose sum is σ = 7138560. Its totient is φ = 1741824.

The previous prime is 3856949. The next prime is 3856967. The reversal of 3856965 is 5696583.

It is not a de Polignac number, because 3856965 - 2⁴ = 3856949 is a prime.

It is a super-2 number, since 2×3856965² = 29752358022450, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3856967) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11277 + ... + 11613.

It is an arithmetic number, because the mean of its divisors is an integer number (223080).

Almost surely, 2^3856965 is an apocalyptic number.

3856965 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3856965 is a deficient number, since it is larger than the sum of its proper divisors (3281595).

3856965 is a wasteful number, since it uses less digits than its factorization.

3856965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461.

The product of its digits is 194400, while the sum is 42.

The square root of 3856965 is about 1963.9157313897. The cubic root of 3856965 is about 156.8249770403.

The spelling of 3856965 in words is "three million, eight hundred fifty-six thousand, nine hundred sixty-five".