290340228 has 24 divisors (see below), whose sum is σ = 700822080. Its totient is φ = 93442720.

The previous prime is 290340227. The next prime is 290340241. The reversal of 290340228 is 822043092.

It is a junction number, because it is equal to n+sod(n) for n = 290340195 and 290340204.

It is not an unprimeable number, because it can be changed into a prime (290340223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416808 + ... + 417503.

It is an arithmetic number, because the mean of its divisors is an integer number (29200920).

Almost surely, 2^290340228 is an apocalyptic number.

It is an amenable number.

290340228 is an abundant number, since it is smaller than the sum of its proper divisors (410481852).

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

290340228 is a wasteful number, since it uses less digits than its factorization.

290340228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834347 (or 834345 counting only the distinct ones).

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

The square root of 290340228 is about 17039.3728757839. The cubic root of 290340228 is about 662.1693448104.

The spelling of 290340228 in words is "two hundred ninety million, three hundred forty thousand, two hundred twenty-eight".