228388398 has 128 divisors (see below), whose sum is σ = 580608000. Its totient is φ = 58423680.

The previous prime is 228388373. The next prime is 228388403. The reversal of 228388398 is 893883822.

It is a super-2 number, since 2×228388398² = 104322520682012808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228388398.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1643013 + ... + 1643151.

It is an arithmetic number, because the mean of its divisors is an integer number (4536000).

Almost surely, 2^228388398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228388398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290304000).

228388398 is an abundant number, since it is smaller than the sum of its proper divisors (352219602).

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

228388398 is a wasteful number, since it uses less digits than its factorization.

228388398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270.

The product of its digits is 1327104, while the sum is 51.

The square root of 228388398 is about 15112.5245409230. The cubic root of 228388398 is about 611.2581735350.

The spelling of 228388398 in words is "two hundred twenty-eight million, three hundred eighty-eight thousand, three hundred ninety-eight".