1728822 has 8 divisors (see below), whose sum is σ = 3457656. Its totient is φ = 576272.

The previous prime is 1728821. The next prime is 1728823. The reversal of 1728822 is 2288271.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1728821) and next prime (1728823).

It is a sphenic number, since it is the product of 3 distinct primes.

1728822 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1728822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144063 + ... + 144074.

It is an arithmetic number, because the mean of its divisors is an integer number (432207).

2^1728822 is an apocalyptic number.

1728822 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1728822 is a wasteful number, since it uses less digits than its factorization.

1728822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288142.

The product of its digits is 3584, while the sum is 30.

The square root of 1728822 is about 1314.8467591320. The cubic root of 1728822 is about 120.0190247614.

The spelling of 1728822 in words is "one million, seven hundred twenty-eight thousand, eight hundred twenty-two".