3864872 has 32 divisors (see below), whose sum is σ = 8125920. Its totient is φ = 1707840.

The previous prime is 3864871. The next prime is 3864901. The reversal of 3864872 is 2784683.

It is not an unprimeable number, because it can be changed into a prime (3864871) 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, 2663 + ... + 3849.

It is an arithmetic number, because the mean of its divisors is an integer number (253935).

Almost surely, 2^3864872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3864872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4062960).

3864872 is an abundant number, since it is smaller than the sum of its proper divisors (4261048).

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

3864872 is a wasteful number, since it uses less digits than its factorization.

3864872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 1237 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 3864872 is about 1965.9277707993. The cubic root of 3864872 is about 156.9320706307.

The spelling of 3864872 in words is "three million, eight hundred sixty-four thousand, eight hundred seventy-two".