228137879 has 4 divisors (see below), whose sum is σ = 228815184. Its totient is φ = 227460576.

The previous prime is 228137869. The next prime is 228137887. The reversal of 228137879 is 978731822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978731822 = 2 ⋅489365911.

It is a cyclic number.

It is not a de Polignac number, because 228137879 - 2⁴ = 228137863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228137869) 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, 338147 + ... + 338820.

It is an arithmetic number, because the mean of its divisors is an integer number (57203796).

Almost surely, 2^228137879 is an apocalyptic number.

228137879 is a deficient number, since it is larger than the sum of its proper divisors (677305).

228137879 is an equidigital number, since it uses as much as digits as its factorization.

228137879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677304.

The product of its digits is 338688, while the sum is 47.

The square root of 228137879 is about 15104.2338104255. The cubic root of 228137879 is about 611.0345956126.

The spelling of 228137879 in words is "two hundred twenty-eight million, one hundred thirty-seven thousand, eight hundred seventy-nine".