228724780 has 12 divisors (see below), whose sum is σ = 480322080. Its totient is φ = 91489904.

The previous prime is 228724777. The next prime is 228724781. The reversal of 228724780 is 87427822.

It is not an unprimeable number, because it can be changed into a prime (228724781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5718100 + ... + 5718139.

It is an arithmetic number, because the mean of its divisors is an integer number (40026840).

Almost surely, 2^228724780 is an apocalyptic number.

228724780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228724780 is an abundant number, since it is smaller than the sum of its proper divisors (251597300).

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

228724780 is a wasteful number, since it uses less digits than its factorization.

228724780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11436248 (or 11436246 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 228724780 is about 15123.6496917907. The cubic root of 228724780 is about 611.5581236549.

The spelling of 228724780 in words is "two hundred twenty-eight million, seven hundred twenty-four thousand, seven hundred eighty".