3220722 has 42 divisors (see below), whose sum is σ = 7400703. Its totient is φ = 1050732.

The previous prime is 3220703. The next prime is 3220727. The reversal of 3220722 is 2270223.

It can be written as a sum of positive squares in only one way, i.e., 1610361 + 1610361 = 1269^2 + 1269^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1269.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 3220695 and 3220704.

It is not an unprimeable number, because it can be changed into a prime (3220727) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 68503 + ... + 68549.

Almost surely, 2^3220722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3220722

3220722 is an abundant number, since it is smaller than the sum of its proper divisors (4179981).

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

3220722 is an frugal number, since it uses more digits than its factorization.

3220722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 3220722 is about 1794.6370106515. The cubic root of 3220722 is about 147.6786612241.

Multiplying 3220722 by its sum of digits (18), we get a square (57972996 = 7614²).

3220722 divided by its sum of digits (18) gives a square (178929 = 423²).

Adding to 3220722 its reverse (2270223), we get a palindrome (5490945).

The spelling of 3220722 in words is "three million, two hundred twenty thousand, seven hundred twenty-two".