228136132 has 24 divisors (see below), whose sum is σ = 456724800. Its totient is φ = 97675680.

The previous prime is 228136109. The next prime is 228136133. The reversal of 228136132 is 231631822.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 228136132.

It is not an unprimeable number, because it can be changed into a prime (228136133) 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, 29619 + ... + 36517.

It is an arithmetic number, because the mean of its divisors is an integer number (19030200).

Almost surely, 2^228136132 is an apocalyptic number.

It is an amenable number.

228136132 is an abundant number, since it is smaller than the sum of its proper divisors (228588668).

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

228136132 is a wasteful number, since it uses less digits than its factorization.

228136132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8091 (or 8089 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 228136132 is about 15104.1759788477. The cubic root of 228136132 is about 611.0330359123.

Adding to 228136132 its reverse (231631822), we get a palindrome (459767954).

The spelling of 228136132 in words is "two hundred twenty-eight million, one hundred thirty-six thousand, one hundred thirty-two".