228120380 has 24 divisors (see below), whose sum is σ = 495573120. Its totient is φ = 88101440.

The previous prime is 228120377. The next prime is 228120391. The reversal of 228120380 is 83021822.

It is a congruent number.

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, 196076 + ... + 197235.

It is an arithmetic number, because the mean of its divisors is an integer number (20648880).

Almost surely, 2^228120380 is an apocalyptic number.

228120380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228120380 is an abundant number, since it is smaller than the sum of its proper divisors (267452740).

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

228120380 is a wasteful number, since it uses less digits than its factorization.

228120380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393349 (or 393347 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 228120380 is about 15103.6545246506. The cubic root of 228120380 is about 611.0189723591.

The spelling of 228120380 in words is "two hundred twenty-eight million, one hundred twenty thousand, three hundred eighty".