228140239 has 4 divisors (see below), whose sum is σ = 240147640. Its totient is φ = 216132840.

The previous prime is 228140219. The next prime is 228140251. The reversal of 228140239 is 932041822.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228140239 - 2⁵ = 228140207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228140239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228140219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6003672 + ... + 6003709.

It is an arithmetic number, because the mean of its divisors is an integer number (60036910).

Almost surely, 2^228140239 is an apocalyptic number.

228140239 is a deficient number, since it is larger than the sum of its proper divisors (12007401).

228140239 is a wasteful number, since it uses less digits than its factorization.

228140239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12007400.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 228140239 is about 15104.3119340141. The cubic root of 228140239 is about 611.0367025792.

The spelling of 228140239 in words is "two hundred twenty-eight million, one hundred forty thousand, two hundred thirty-nine".