228380818 has 4 divisors (see below), whose sum is σ = 342571230. Its totient is φ = 114190408.

The previous prime is 228380809. The next prime is 228380819. The reversal of 228380818 is 818083822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 818083822 = 2 ⋅409041911.

It can be written as a sum of positive squares in only one way, i.e., 227798649 + 582169 = 15093^2 + 763^2 .

It is not an unprimeable number, because it can be changed into a prime (228380819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57095203 + ... + 57095206.

Almost surely, 2^228380818 is an apocalyptic number.

228380818 is a deficient number, since it is larger than the sum of its proper divisors (114190412).

228380818 is a wasteful number, since it uses less digits than its factorization.

228380818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114190411.

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 228380818 is about 15112.2737534760. The cubic root of 228380818 is about 611.2514110954.

The spelling of 228380818 in words is "two hundred twenty-eight million, three hundred eighty thousand, eight hundred eighteen".