228786538 has 8 divisors (see below), whose sum is σ = 344217600. Its totient is φ = 114047340.

The previous prime is 228786533. The next prime is 228786557. The reversal of 228786538 is 835687822.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 228786491 and 228786500.

It is not an unprimeable number, because it can be changed into a prime (228786533) 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, 172138 + ... + 173461.

It is an arithmetic number, because the mean of its divisors is an integer number (43027200).

Almost surely, 2^228786538 is an apocalyptic number.

228786538 is a deficient number, since it is larger than the sum of its proper divisors (115431062).

228786538 is a wasteful number, since it uses less digits than its factorization.

228786538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345932.

The product of its digits is 1290240, while the sum is 49.

The square root of 228786538 is about 15125.6913230437. The cubic root of 228786538 is about 611.6131609911.

The spelling of 228786538 in words is "two hundred twenty-eight million, seven hundred eighty-six thousand, five hundred thirty-eight".