228771380 has 48 divisors (see below), whose sum is σ = 513429840. Its totient is φ = 85321728.

The previous prime is 228771371. The next prime is 228771383. The reversal of 228771380 is 83177822.

It can be written as a sum of positive squares in 8 ways, for example, as 6522916 + 222248464 = 2554^2 + 14908^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228771383) 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 15 ways as a sum of consecutive naturals, for example, 33974 + ... + 40146.

It is an arithmetic number, because the mean of its divisors is an integer number (10696455).

Almost surely, 2^228771380 is an apocalyptic number.

228771380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228771380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256714920).

228771380 is an abundant number, since it is smaller than the sum of its proper divisors (284658460).

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

228771380 is a wasteful number, since it uses less digits than its factorization.

228771380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6308 (or 6306 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 228771380 is about 15125.1902467374. The cubic root of 228771380 is about 611.5996534407.

The spelling of 228771380 in words is "two hundred twenty-eight million, seven hundred seventy-one thousand, three hundred eighty".