3945872 has 40 divisors (see below), whose sum is σ = 8928000. Its totient is φ = 1688736.

The previous prime is 3945841. The next prime is 3945883. The reversal of 3945872 is 2785493.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5129 + ... + 5847.

It is an arithmetic number, because the mean of its divisors is an integer number (223200).

Almost surely, 2^3945872 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 3945872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4464000).

3945872 is an abundant number, since it is smaller than the sum of its proper divisors (4982128).

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

3945872 is an equidigital number, since it uses as much as digits as its factorization.

3945872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748 (or 728 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 3945872 is about 1986.4219088603. The cubic root of 3945872 is about 158.0208272497.

The spelling of 3945872 in words is "three million, nine hundred forty-five thousand, eight hundred seventy-two".