228322290 has 32 divisors (see below), whose sum is σ = 626256000. Its totient is φ = 52187904.

The previous prime is 228322273. The next prime is 228322309. The reversal of 228322290 is 92223822.

It is a super-2 number, since 2×228322290² = 104262136221688200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543415 + ... + 543834.

It is an arithmetic number, because the mean of its divisors is an integer number (19570500).

Almost surely, 2^228322290 is an apocalyptic number.

228322290 is an abundant number, since it is smaller than the sum of its proper divisors (397933710).

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

228322290 is a wasteful number, since it uses less digits than its factorization.

228322290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087266.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 228322290 is about 15110.3371901490. The cubic root of 228322290 is about 611.1991907449.

The spelling of 228322290 in words is "two hundred twenty-eight million, three hundred twenty-two thousand, two hundred ninety".