228221740 has 24 divisors (see below), whose sum is σ = 487125072. Its totient is φ = 89791680.

The previous prime is 228221731. The next prime is 228221767. The reversal of 228221740 is 47122822.

228221740 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 228221699 and 228221708.

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, 92314 + ... + 94753.

It is an arithmetic number, because the mean of its divisors is an integer number (20296878).

Almost surely, 2^228221740 is an apocalyptic number.

228221740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228221740 is an abundant number, since it is smaller than the sum of its proper divisors (258903332).

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

228221740 is a wasteful number, since it uses less digits than its factorization.

228221740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187137 (or 187135 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 228221740 is about 15107.0096312937. The cubic root of 228221740 is about 611.1094563285.

The spelling of 228221740 in words is "two hundred twenty-eight million, two hundred twenty-one thousand, seven hundred forty".