228399912 has 160 divisors (see below), whose sum is σ = 725709600. Its totient is φ = 66531456.

The previous prime is 228399907. The next prime is 228399929. The reversal of 228399912 is 219993822.

It is a happy number.

228399912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 159343 + ... + 160769.

It is an arithmetic number, because the mean of its divisors is an integer number (4535685).

Almost surely, 2^228399912 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 228399912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362854800).

228399912 is an abundant number, since it is smaller than the sum of its proper divisors (497309688).

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

228399912 is a wasteful number, since it uses less digits than its factorization.

228399912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477 (or 1464 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 228399912 is about 15112.9054784313. The cubic root of 228399912 is about 611.2684453766.

The spelling of 228399912 in words is "two hundred twenty-eight million, three hundred ninety-nine thousand, nine hundred twelve".