3869720 has 32 divisors (see below), whose sum is σ = 8812800. Its totient is φ = 1529088.

The previous prime is 3869687. The next prime is 3869729. The reversal of 3869720 is 279683.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3869729) 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, 3017 + ... + 4103.

It is an arithmetic number, because the mean of its divisors is an integer number (275400).

Almost surely, 2^3869720 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 3869720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4406400).

3869720 is an abundant number, since it is smaller than the sum of its proper divisors (4943080).

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

3869720 is a wasteful number, since it uses less digits than its factorization.

3869720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187 (or 1183 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 3869720 is about 1967.1603900038. The cubic root of 3869720 is about 156.9976604517.

The spelling of 3869720 in words is "three million, eight hundred sixty-nine thousand, seven hundred twenty".