228530140 has 24 divisors (see below), whose sum is σ = 495395712. Its totient is φ = 88463040.

The previous prime is 228530131. The next prime is 228530161. The reversal of 228530140 is 41035822.

228530140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 183679 + ... + 184918.

It is an arithmetic number, because the mean of its divisors is an integer number (20641488).

Almost surely, 2^228530140 is an apocalyptic number.

228530140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228530140 is an abundant number, since it is smaller than the sum of its proper divisors (266865572).

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

228530140 is a wasteful number, since it uses less digits than its factorization.

228530140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368637 (or 368635 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 228530140 is about 15117.2133675489. The cubic root of 228530140 is about 611.3846000367.

Adding to 228530140 its reverse (41035822), we get a palindrome (269565962).

The spelling of 228530140 in words is "two hundred twenty-eight million, five hundred thirty thousand, one hundred forty".