3965823 has 12 divisors (see below), whose sum is σ = 5798520. Its totient is φ = 2611536.

The previous prime is 3965789. The next prime is 3965827. The reversal of 3965823 is 3285693.

It is not a de Polignac number, because 3965823 - 2¹⁶ = 3900287 is a prime.

3965823 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3965827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1908 + ... + 3401.

It is an arithmetic number, because the mean of its divisors is an integer number (483210).

Almost surely, 2^3965823 is an apocalyptic number.

3965823 is a deficient number, since it is larger than the sum of its proper divisors (1832697).

3965823 is a wasteful number, since it uses less digits than its factorization.

3965823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5398 (or 5395 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 3965823 is about 1991.4374205583. The cubic root of 3965823 is about 158.2867063688.

The spelling of 3965823 in words is "three million, nine hundred sixty-five thousand, eight hundred twenty-three".