3422720 has 80 divisors (see below), whose sum is σ = 9427968. Its totient is φ = 1167360.

The previous prime is 3422707. The next prime is 3422723. The reversal of 3422720 is 272243.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 3422692 and 3422701.

It is not an unprimeable number, because it can be changed into a prime (3422723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17825 + ... + 18015.

Almost surely, 2^3422720 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 3422720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4713984).

3422720 is an abundant number, since it is smaller than the sum of its proper divisors (6005248).

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

3422720 is an equidigital number, since it uses as much as digits as its factorization.

3422720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 3422720 is about 1850.0594585040. The cubic root of 3422720 is about 150.7036569144.

Adding to 3422720 its reverse (272243), we get a palindrome (3694963).

The spelling of 3422720 in words is "three million, four hundred twenty-two thousand, seven hundred twenty".