228597290 has 16 divisors (see below), whose sum is σ = 414239400. Its totient is φ = 90824640.

The previous prime is 228597289. The next prime is 228597293. The reversal of 228597290 is 92795822.

It can be written as a sum of positive squares in 4 ways, for example, as 97792321 + 130804969 = 9889^2 + 11437^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228597293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75221 + ... + 78200.

Almost surely, 2^228597290 is an apocalyptic number.

228597290 is a deficient number, since it is larger than the sum of its proper divisors (185642110).

228597290 is a wasteful number, since it uses less digits than its factorization.

228597290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153577.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 228597290 is about 15119.4341825347. The cubic root of 228597290 is about 611.4444761001. Note that the first 4 decimals are identical.

The spelling of 228597290 in words is "two hundred twenty-eight million, five hundred ninety-seven thousand, two hundred ninety".