1722448 has 60 divisors (see below), whose sum is σ = 4205460. Its totient is φ = 681408.

The previous prime is 1722443. The next prime is 1722449. The reversal of 1722448 is 8442271.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 63504 + 1658944 = 252^2 + 1288^2 .

It is a super-2 number, since 2×1722448² = 5933654225408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722443) 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 11 ways as a sum of consecutive naturals, for example, 132490 + ... + 132502.

It is an arithmetic number, because the mean of its divisors is an integer number (70091).

2^1722448 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 1722448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2102730).

1722448 is an abundant number, since it is smaller than the sum of its proper divisors (2483012).

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

1722448 is an equidigital number, since it uses as much as digits as its factorization.

1722448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61 (or 22 counting only the distinct ones).

The product of its digits is 3584, while the sum is 28.

The square root of 1722448 is about 1312.4206642689. The cubic root of 1722448 is about 119.8713435935.

Multiplying 1722448 by its sum of digits (28), we get a cube (48228544 = 364³).

1722448 divided by its sum of digits (28) gives a palindrome (61516).

The spelling of 1722448 in words is "one million, seven hundred twenty-two thousand, four hundred forty-eight".