3969864 has 32 divisors (see below), whose sum is σ = 11028000. Its totient is φ = 1323216.

The previous prime is 3969863. The next prime is 3969871. The reversal of 3969864 is 4689693.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (3969863) 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, 8974 + ... + 9405.

It is an arithmetic number, because the mean of its divisors is an integer number (344625).

Almost surely, 2^3969864 is an apocalyptic number.

It is an amenable number.

3969864 is an abundant number, since it is smaller than the sum of its proper divisors (7058136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3969864 is a wasteful number, since it uses less digits than its factorization.

3969864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18394 (or 18384 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 3969864 is about 1992.4517560031. The cubic root of 3969864 is about 158.3404505265.

The spelling of 3969864 in words is "three million, nine hundred sixty-nine thousand, eight hundred sixty-four".