228812280 has 64 divisors (see below), whose sum is σ = 716290560. Its totient is φ = 58363008.

The previous prime is 228812251. The next prime is 228812321. The reversal of 228812280 is 82218822.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38692 + ... + 44211.

It is an arithmetic number, because the mean of its divisors is an integer number (11192040).

Almost surely, 2^228812280 is an apocalyptic number.

228812280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228812280 is an abundant number, since it is smaller than the sum of its proper divisors (487478280).

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

228812280 is a wasteful number, since it uses less digits than its factorization.

228812280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82940 (or 82936 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 228812280 is about 15126.5422354218. The cubic root of 228812280 is about 611.6360987561.

The spelling of 228812280 in words is "two hundred twenty-eight million, eight hundred twelve thousand, two hundred eighty".