3979864 has 16 divisors (see below), whose sum is σ = 8528400. Its totient is φ = 1705632.

The previous prime is 3979861. The next prime is 3979883. The reversal of 3979864 is 4689793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3979861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35479 + ... + 35590.

It is an arithmetic number, because the mean of its divisors is an integer number (533025).

Almost surely, 2^3979864 is an apocalyptic number.

It is an amenable number.

3979864 is an abundant number, since it is smaller than the sum of its proper divisors (4548536).

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

3979864 is a wasteful number, since it uses less digits than its factorization.

3979864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71082 (or 71078 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 3979864 is about 1994.9596487147. The cubic root of 3979864 is about 158.4732910841.

The spelling of 3979864 in words is "three million, nine hundred seventy-nine thousand, eight hundred sixty-four".