228178636 has 12 divisors (see below), whose sum is σ = 456357328. Its totient is φ = 97790832.

The previous prime is 228178633. The next prime is 228178661. The reversal of 228178636 is 636871822.

228178636 is an admirable number.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 228178592 and 228178601.

It is not an unprimeable number, because it can be changed into a prime (228178633) 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, 4074591 + ... + 4074646.

Almost surely, 2^228178636 is an apocalyptic number.

It is an amenable number.

228178636 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.

228178636 is a wasteful number, since it uses less digits than its factorization.

228178636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8149248 (or 8149246 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 228178636 is about 15105.5829414161. The cubic root of 228178636 is about 611.0709807061.

It can be divided in two parts, 2281786 and 36, that added together give a palindrome (2281822).

The spelling of 228178636 in words is "two hundred twenty-eight million, one hundred seventy-eight thousand, six hundred thirty-six".