1779222 has 16 divisors (see below), whose sum is σ = 3594240. Its totient is φ = 587112.

The previous prime is 1779191. The next prime is 1779223. The reversal of 1779222 is 2229771.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1779222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1779223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 822 + ... + 2057.

It is an arithmetic number, because the mean of its divisors is an integer number (224640).

2^1779222 is an apocalyptic number.

1779222 is an abundant number, since it is smaller than the sum of its proper divisors (1815018).

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

1779222 is a wasteful number, since it uses less digits than its factorization.

1779222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2987.

The product of its digits is 3528, while the sum is 30.

The square root of 1779222 is about 1333.8748067191. The cubic root of 1779222 is about 121.1741680507.

The spelling of 1779222 in words is "one million, seven hundred seventy-nine thousand, two hundred twenty-two".