3613720 has 64 divisors (see below), whose sum is σ = 9123840. Its totient is φ = 1276800.

The previous prime is 3613717. The next prime is 3613721. The reversal of 3613720 is 273163.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 3613691 and 3613700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3613721) 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, 18825 + ... + 19015.

It is an arithmetic number, because the mean of its divisors is an integer number (142560).

Almost surely, 2^3613720 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 3613720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4561920).

3613720 is an abundant number, since it is smaller than the sum of its proper divisors (5510120).

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

3613720 is a wasteful number, since it uses less digits than its factorization.

3613720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 3613720 is about 1900.9786953041. The cubic root of 3613720 is about 153.4563390203.

Adding to 3613720 its reverse (273163), we get a palindrome (3886883).

The spelling of 3613720 in words is "three million, six hundred thirteen thousand, seven hundred twenty".