228136736 has 48 divisors (see below), whose sum is σ = 491997240. Its totient is φ = 103649280.

The previous prime is 228136697. The next prime is 228136739. The reversal of 228136736 is 637631822.

It can be written as a sum of positive squares in 4 ways, for example, as 173080336 + 55056400 = 13156^2 + 7420^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 228136736.

It is not an unprimeable number, because it can be changed into a prime (228136739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8546 + ... + 23006.

Almost surely, 2^228136736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228136736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245998620).

228136736 is an abundant number, since it is smaller than the sum of its proper divisors (263860504).

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

228136736 is a wasteful number, since it uses less digits than its factorization.

228136736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14517 (or 14509 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 228136736 is about 15104.1959733049. The cubic root of 228136736 is about 611.0335751571.

The spelling of 228136736 in words is "two hundred twenty-eight million, one hundred thirty-six thousand, seven hundred thirty-six".