228136618 has 4 divisors (see below), whose sum is σ = 342204930. Its totient is φ = 114068308.

The previous prime is 228136603. The next prime is 228136619. The reversal of 228136618 is 816631822.

It is a happy number.

228136618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 177342489 + 50794129 = 13317^2 + 7127^2 .

It is not an unprimeable number, because it can be changed into a prime (228136619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57034153 + ... + 57034156.

Almost surely, 2^228136618 is an apocalyptic number.

228136618 is a deficient number, since it is larger than the sum of its proper divisors (114068312).

228136618 is a wasteful number, since it uses less digits than its factorization.

228136618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114068311.

The product of its digits is 27648, while the sum is 37.

The square root of 228136618 is about 15104.1920671051. The cubic root of 228136618 is about 611.0334698080.

The spelling of 228136618 in words is "two hundred twenty-eight million, one hundred thirty-six thousand, six hundred eighteen".