3781872 has 30 divisors (see below), whose sum is σ = 10584392. Its totient is φ = 1260576.

The previous prime is 3781859. The next prime is 3781873. The reversal of 3781872 is 2781873.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781873) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12988 + ... + 13275.

Almost surely, 2^3781872 is an apocalyptic number.

It is an amenable number.

3781872 is an abundant number, since it is smaller than the sum of its proper divisors (6802520).

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

3781872 is a wasteful number, since it uses less digits than its factorization.

3781872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26277 (or 26268 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 3781872 is about 1944.7035763838. The cubic root of 3781872 is about 155.8005340205.

Subtracting from 3781872 its reverse (2781873), we obtain a palindrome (999999).

It can be divided in two parts, 3 and 781872, that added together give a triangular number (781875 = T₁₂₅₀).

The spelling of 3781872 in words is "three million, seven hundred eighty-one thousand, eight hundred seventy-two".