290109228 has 12 divisors (see below), whose sum is σ = 676921560. Its totient is φ = 96703072.

The previous prime is 290109223. The next prime is 290109247. The reversal of 290109228 is 822901092.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (290109221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12087873 + ... + 12087896.

It is an arithmetic number, because the mean of its divisors is an integer number (56410130).

Almost surely, 2^290109228 is an apocalyptic number.

It is an amenable number.

290109228 is an abundant number, since it is smaller than the sum of its proper divisors (386812332).

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

290109228 is a wasteful number, since it uses less digits than its factorization.

290109228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24175776 (or 24175774 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 290109228 is about 17032.5931085082. The cubic root of 290109228 is about 661.9936868661.

The spelling of 290109228 in words is "two hundred ninety million, one hundred nine thousand, two hundred twenty-eight".