228360138 has 8 divisors (see below), whose sum is σ = 456720288. Its totient is φ = 76120044.

The previous prime is 228360137. The next prime is 228360161. The reversal of 228360138 is 831063822.

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

228360138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 228360099 and 228360108.

It is not an unprimeable number, because it can be changed into a prime (228360131) 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, 19030006 + ... + 19030017.

It is an arithmetic number, because the mean of its divisors is an integer number (57090036).

Almost surely, 2^228360138 is an apocalyptic number.

228360138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

228360138 is a wasteful number, since it uses less digits than its factorization.

228360138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38060028.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 228360138 is about 15111.5895259235. The cubic root of 228360138 is about 611.2329608291.

The spelling of 228360138 in words is "two hundred twenty-eight million, three hundred sixty thousand, one hundred thirty-eight".