228387880 has 32 divisors (see below), whose sum is σ = 587283840. Its totient is φ = 78304320.

The previous prime is 228387839. The next prime is 228387893. The reversal of 228387880 is 88783822.

228387880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×228387880² = 104322047461788800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 228387880.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407556 + ... + 408115.

It is an arithmetic number, because the mean of its divisors is an integer number (18352620).

Almost surely, 2^228387880 is an apocalyptic number.

228387880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228387880 is an abundant number, since it is smaller than the sum of its proper divisors (358895960).

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

228387880 is a wasteful number, since it uses less digits than its factorization.

228387880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815689 (or 815685 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 46.

The square root of 228387880 is about 15112.5074028104. The cubic root of 228387880 is about 611.2577114100.

The spelling of 228387880 in words is "two hundred twenty-eight million, three hundred eighty-seven thousand, eight hundred eighty".