228713388 has 24 divisors (see below), whose sum is σ = 546076608. Its totient is φ = 74464656.

The previous prime is 228713383. The next prime is 228713437. The reversal of 228713388 is 883317822.

228713388 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (228713383) 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, 221106 + ... + 222137.

It is an arithmetic number, because the mean of its divisors is an integer number (22753192).

Almost surely, 2^228713388 is an apocalyptic number.

It is an amenable number.

228713388 is an abundant number, since it is smaller than the sum of its proper divisors (317363220).

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

228713388 is a wasteful number, since it uses less digits than its factorization.

228713388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443293 (or 443291 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 228713388 is about 15123.2730584355. The cubic root of 228713388 is about 611.5479702793.

The spelling of 228713388 in words is "two hundred twenty-eight million, seven hundred thirteen thousand, three hundred eighty-eight".