228200728 has 32 divisors (see below), whose sum is σ = 489636000. Its totient is φ = 97673472.

The previous prime is 228200689. The next prime is 228200737. The reversal of 228200728 is 827002822.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 228200728.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 50298 + ... + 54646.

It is an arithmetic number, because the mean of its divisors is an integer number (15301125).

Almost surely, 2^228200728 is an apocalyptic number.

228200728 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

228200728 is an abundant number, since it is smaller than the sum of its proper divisors (261435272).

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

228200728 is a wasteful number, since it uses less digits than its factorization.

228200728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5299 (or 5295 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 228200728 is about 15106.3141765290. The cubic root of 228200728 is about 611.0907011390.

The spelling of 228200728 in words is "two hundred twenty-eight million, two hundred thousand, seven hundred twenty-eight".