3879640 has 32 divisors (see below), whose sum is σ = 9110880. Its totient is φ = 1484032.

The previous prime is 3879607. The next prime is 3879641. The reversal of 3879640 is 469783.

3879640 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3879640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3879641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1189 + ... + 3028.

It is an arithmetic number, because the mean of its divisors is an integer number (284715).

Almost surely, 2^3879640 is an apocalyptic number.

It is an amenable number.

3879640 is an abundant number, since it is smaller than the sum of its proper divisors (5231240).

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

3879640 is a wasteful number, since it uses less digits than its factorization.

3879640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4251 (or 4247 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 3879640 is about 1969.6801770846. The cubic root of 3879640 is about 157.1317001130.

The spelling of 3879640 in words is "three million, eight hundred seventy-nine thousand, six hundred forty".