3881872 has 10 divisors (see below), whose sum is σ = 7521158. Its totient is φ = 1940928.

The previous prime is 3881869. The next prime is 3881873. The reversal of 3881872 is 2781883.

It can be written as a sum of positive squares in only one way, i.e., 2202256 + 1679616 = 1484^2 + 1296^2 .

It is not an unprimeable number, because it can be changed into a prime (3881873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121293 + ... + 121324.

Almost surely, 2^3881872 is an apocalyptic number.

It is an amenable number.

3881872 is a deficient number, since it is larger than the sum of its proper divisors (3639286).

3881872 is a wasteful number, since it uses less digits than its factorization.

3881872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242625 (or 242619 counting only the distinct ones).

The product of its digits is 21504, while the sum is 37.

The square root of 3881872 is about 1970.2466850626. The cubic root of 3881872 is about 157.1618275406.

It can be divided in two parts, 3881 and 872, that added together give a triangular number (4753 = T₉₇).

The spelling of 3881872 in words is "three million, eight hundred eighty-one thousand, eight hundred seventy-two".