3879720 has 96 divisors (see below), whose sum is σ = 13595400. Its totient is φ = 953856.

The previous prime is 3879719. The next prime is 3879721. The reversal of 3879720 is 279783.

3879720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3879719) and next prime (3879721).

It can be written as a sum of positive squares in 4 ways, for example, as 2566404 + 1313316 = 1602^2 + 1146^2 .

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

It is not an unprimeable number, because it can be changed into a prime (3879721) 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 23 ways as a sum of consecutive naturals, for example, 4266 + ... + 5094.

Almost surely, 2^3879720 is an apocalyptic number.

3879720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3879720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6797700).

3879720 is an abundant number, since it is smaller than the sum of its proper divisors (9715680).

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

3879720 is a wasteful number, since it uses less digits than its factorization.

3879720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 3879720 is about 1969.7004848453. The cubic root of 3879720 is about 157.1327801488.

The spelling of 3879720 in words is "three million, eight hundred seventy-nine thousand, seven hundred twenty".