308406222 has 12 divisors (see below), whose sum is σ = 668213520. Its totient is φ = 102802068.

The previous prime is 308406221. The next prime is 308406289. The reversal of 308406222 is 222604803.

308406222 is a `hidden beast` number, since 30 + 8 + 4 + 0 + 622 + 2 = 666.

It is a super-2 number, since 2×308406222² = 190228795536626568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308406221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8566822 + ... + 8566857.

It is an arithmetic number, because the mean of its divisors is an integer number (55684460).

Almost surely, 2^308406222 is an apocalyptic number.

308406222 is an abundant number, since it is smaller than the sum of its proper divisors (359807298).

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

308406222 is a wasteful number, since it uses less digits than its factorization.

308406222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17133687 (or 17133684 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 308406222 is about 17561.4982845998. The cubic root of 308406222 is about 675.6281099916.

The spelling of 308406222 in words is "three hundred eight million, four hundred six thousand, two hundred twenty-two".