228969788292 has 144 divisors (see below), whose sum is σ = 702856732032. Its totient is φ = 61353815040.

The previous prime is 228969788239. The next prime is 228969788323. The reversal of 228969788292 is 292887969822.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 228969788292.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1117942 + ... + 1306802.

It is an arithmetic number, because the mean of its divisors is an integer number (4880949528).

Almost surely, 2^228969788292 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228969788292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351428366016).

228969788292 is an abundant number, since it is smaller than the sum of its proper divisors (473886943740).

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

228969788292 is a wasteful number, since it uses less digits than its factorization.

228969788292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189178 (or 189173 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 72.

The spelling of 228969788292 in words is "two hundred twenty-eight billion, nine hundred sixty-nine million, seven hundred eighty-eight thousand, two hundred ninety-two".