228725388 has 72 divisors (see below), whose sum is σ = 595651056. Its totient is φ = 73958400.

The previous prime is 228725377. The next prime is 228725389. The reversal of 228725388 is 883527822.

It is not an unprimeable number, because it can be changed into a prime (228725389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 355395 + ... + 356037.

Almost surely, 2^228725388 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 228725388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297825528).

228725388 is an abundant number, since it is smaller than the sum of its proper divisors (366925668).

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

228725388 is a wasteful number, since it uses less digits than its factorization.

228725388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935 (or 930 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 228725388 is about 15123.6697927454. The cubic root of 228725388 is about 611.5586655391.

The spelling of 228725388 in words is "two hundred twenty-eight million, seven hundred twenty-five thousand, three hundred eighty-eight".