3809720 has 64 divisors (see below), whose sum is σ = 9253440. Its totient is φ = 1408000.

The previous prime is 3809719. The next prime is 3809723. The reversal of 3809720 is 279083.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3809723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37670 + ... + 37770.

It is an arithmetic number, because the mean of its divisors is an integer number (144585).

Almost surely, 2^3809720 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 3809720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4626720).

3809720 is an abundant number, since it is smaller than the sum of its proper divisors (5443720).

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

3809720 is a wasteful number, since it uses less digits than its factorization.

3809720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 3809720 is about 1951.8504041038. The cubic root of 3809720 is about 156.1820141563.

The spelling of 3809720 in words is "three million, eight hundred nine thousand, seven hundred twenty".