1728222212 has 12 divisors (see below), whose sum is σ = 3042500160. Its totient is φ = 858936456.

The previous prime is 1728222191. The next prime is 1728222229. The reversal of 1728222212 is 2122228271.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1292912 + ... + 1294247.

It is an arithmetic number, because the mean of its divisors is an integer number (253541680).

Almost surely, 2^1728222212 is an apocalyptic number.

It is an amenable number.

1728222212 is a deficient number, since it is larger than the sum of its proper divisors (1314277948).

1728222212 is a wasteful number, since it uses less digits than its factorization.

1728222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2587330 (or 2587328 counting only the distinct ones).

The product of its digits is 3584, while the sum is 29.

The square root of 1728222212 is about 41571.8920906903. The cubic root of 1728222212 is about 1200.0514357582.

The spelling of 1728222212 in words is "one billion, seven hundred twenty-eight million, two hundred twenty-two thousand, two hundred twelve".