3720520 has 32 divisors (see below), whose sum is σ = 8553600. Its totient is φ = 1455808.

The previous prime is 3720511. The next prime is 3720551. The reversal of 3720520 is 250273.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 891 + ... + 2869.

It is an arithmetic number, because the mean of its divisors is an integer number (267300).

Almost surely, 2^3720520 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 3720520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4276800).

3720520 is an abundant number, since it is smaller than the sum of its proper divisors (4833080).

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

3720520 is a wasteful number, since it uses less digits than its factorization.

3720520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037 (or 2033 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 3720520 is about 1928.8649512084. The cubic root of 3720520 is about 154.9534372798.

Adding to 3720520 its reverse (250273), we get a palindrome (3970793).

The spelling of 3720520 in words is "three million, seven hundred twenty thousand, five hundred twenty".