228498187 has 4 divisors (see below), whose sum is σ = 230716720. Its totient is φ = 226279656.

The previous prime is 228498181. The next prime is 228498203. The reversal of 228498187 is 781894822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 781894822 = 2 ⋅390947411.

It is a cyclic number.

It is not a de Polignac number, because 228498187 - 2⁷ = 228498059 is a prime.

It is a super-2 number, since 2×228498187² = 104422842924573938, which contains 22 as substring.

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 228498187.

It is not an unprimeable number, because it can be changed into a prime (228498181) 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, 1109112 + ... + 1109317.

It is an arithmetic number, because the mean of its divisors is an integer number (57679180).

Almost surely, 2^228498187 is an apocalyptic number.

228498187 is a deficient number, since it is larger than the sum of its proper divisors (2218533).

228498187 is a wasteful number, since it uses less digits than its factorization.

228498187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218532.

The product of its digits is 516096, while the sum is 49.

The square root of 228498187 is about 15116.1564890021. The cubic root of 228498187 is about 611.3561041854.

The spelling of 228498187 in words is "two hundred twenty-eight million, four hundred ninety-eight thousand, one hundred eighty-seven".