3561320 has 96 divisors (see below), whose sum is σ = 9849600. Its totient is φ = 1153152.

The previous prime is 3561317. The next prime is 3561359. The reversal of 3561320 is 231653.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 3561292 and 3561301.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45041 + ... + 45119.

It is an arithmetic number, because the mean of its divisors is an integer number (102600).

Almost surely, 2^3561320 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 3561320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4924800).

3561320 is an abundant number, since it is smaller than the sum of its proper divisors (6288280).

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

3561320 is a wasteful number, since it uses less digits than its factorization.

3561320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 3561320 is about 1887.1459932925. The cubic root of 3561320 is about 152.7110041594.

Adding to 3561320 its reverse (231653), we get a palindrome (3792973).

The spelling of 3561320 in words is "three million, five hundred sixty-one thousand, three hundred twenty".