228699280 has 20 divisors (see below), whose sum is σ = 531726012. Its totient is φ = 91479680.

The previous prime is 228699259. The next prime is 228699347. The reversal of 228699280 is 82996822.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 140564736 + 88134544 = 11856^2 + 9388^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 228699280.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1429291 + ... + 1429450.

Almost surely, 2^228699280 is an apocalyptic number.

228699280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228699280 is an abundant number, since it is smaller than the sum of its proper divisors (303026732).

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

228699280 is a wasteful number, since it uses less digits than its factorization.

228699280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858754 (or 2858748 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 228699280 is about 15122.8066178206. The cubic root of 228699280 is about 611.5353957404.

The spelling of 228699280 in words is "two hundred twenty-eight million, six hundred ninety-nine thousand, two hundred eighty".