428212222 has 4 divisors (see below), whose sum is σ = 642318336. Its totient is φ = 214106110.

The previous prime is 428212171. The next prime is 428212243. The reversal of 428212222 is 222212824.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107053054 + ... + 107053057.

It is an arithmetic number, because the mean of its divisors is an integer number (160579584).

Almost surely, 2^428212222 is an apocalyptic number.

428212222 is a deficient number, since it is larger than the sum of its proper divisors (214106114).

428212222 is a wasteful number, since it uses less digits than its factorization.

428212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214106113.

The product of its digits is 2048, while the sum is 25.

The square root of 428212222 is about 20693.2892987074. The cubic root of 428212222 is about 753.7367422383.

The spelling of 428212222 in words is "four hundred twenty-eight million, two hundred twelve thousand, two hundred twenty-two".