390912222 has 16 divisors (see below), whose sum is σ = 785795472. Its totient is φ = 129642240.

The previous prime is 390912211. The next prime is 390912227. The reversal of 390912222 is 222219093.

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 390912222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390912227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164179 + ... + 166542.

It is an arithmetic number, because the mean of its divisors is an integer number (49112217).

Almost surely, 2^390912222 is an apocalyptic number.

390912222 is an abundant number, since it is smaller than the sum of its proper divisors (394883250).

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

390912222 is a wasteful number, since it uses less digits than its factorization.

390912222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330923.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 390912222 is about 19771.5002465670. The cubic root of 390912222 is about 731.1835569990.

The spelling of 390912222 in words is "three hundred ninety million, nine hundred twelve thousand, two hundred twenty-two".