3847720 has 64 divisors (see below), whose sum is σ = 9331200. Its totient is φ = 1424640.

The previous prime is 3847687. The next prime is 3847721. The reversal of 3847720 is 277483.

3847720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3847721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35907 + ... + 36013.

It is an arithmetic number, because the mean of its divisors is an integer number (145800).

Almost surely, 2^3847720 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 3847720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4665600).

3847720 is an abundant number, since it is smaller than the sum of its proper divisors (5483480).

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

3847720 is a wasteful number, since it uses less digits than its factorization.

3847720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 3847720 is about 1961.5606031933. The cubic root of 3847720 is about 156.6995756027.

The spelling of 3847720 in words is "three million, eight hundred forty-seven thousand, seven hundred twenty".