228280940 has 24 divisors (see below), whose sum is σ = 481493040. Its totient is φ = 90911808.

The previous prime is 228280909. The next prime is 228281041. The reversal of 228280940 is 49082822.

It is a super-2 number, since 2×228280940² = 104224375134567200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228280940.

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, 20342 + ... + 29501.

It is an arithmetic number, because the mean of its divisors is an integer number (20062210).

Almost surely, 2^228280940 is an apocalyptic number.

228280940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228280940 is an abundant number, since it is smaller than the sum of its proper divisors (253212100).

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

228280940 is a wasteful number, since it uses less digits than its factorization.

228280940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50081 (or 50079 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 228280940 is about 15108.9688595880. The cubic root of 228280940 is about 611.1622917159.

The spelling of 228280940 in words is "two hundred twenty-eight million, two hundred eighty thousand, nine hundred forty".