228500140 has 24 divisors (see below), whose sum is σ = 523473552. Its totient is φ = 83090880.

The previous prime is 228500117. The next prime is 228500149. The reversal of 228500140 is 41005822.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (228500149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519099 + ... + 519538.

It is an arithmetic number, because the mean of its divisors is an integer number (21811398).

Almost surely, 2^228500140 is an apocalyptic number.

228500140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228500140 is an abundant number, since it is smaller than the sum of its proper divisors (294973412).

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

228500140 is a wasteful number, since it uses less digits than its factorization.

228500140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038657 (or 1038655 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 228500140 is about 15116.2210886187. The cubic root of 228500140 is about 611.3578459571.

Adding to 228500140 its reverse (41005822), we get a palindrome (269505962).

The spelling of 228500140 in words is "two hundred twenty-eight million, five hundred thousand, one hundred forty".