1722288444 has 12 divisors (see below), whose sum is σ = 4018673064. Its totient is φ = 574096144.

The previous prime is 1722288443. The next prime is 1722288473. The reversal of 1722288444 is 4448822271.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1722288444² = 5932554968671882272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1722288396 and 1722288405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1722288443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71762007 + ... + 71762030.

It is an arithmetic number, because the mean of its divisors is an integer number (334889422).

Almost surely, 2^1722288444 is an apocalyptic number.

It is an amenable number.

1722288444 is an abundant number, since it is smaller than the sum of its proper divisors (2296384620).

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

1722288444 is a wasteful number, since it uses less digits than its factorization.

1722288444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143524044 (or 143524042 counting only the distinct ones).

The product of its digits is 229376, while the sum is 42.

The square root of 1722288444 is about 41500.4631781381. The cubic root of 1722288444 is about 1198.6764212083.

The spelling of 1722288444 in words is "one billion, seven hundred twenty-two million, two hundred eighty-eight thousand, four hundred forty-four".