228538699 has 4 divisors (see below), whose sum is σ = 229066936. Its totient is φ = 228010464.

The previous prime is 228538697. The next prime is 228538721. The reversal of 228538699 is 996835822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 996835822 = 2 ⋅498417911.

It is a cyclic number.

It is not a de Polignac number, because 228538699 - 2¹ = 228538697 is a prime.

It is a super-2 number, since 2×228538699² = 104459873881225202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228538697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263469 + ... + 264334.

It is an arithmetic number, because the mean of its divisors is an integer number (57266734).

Almost surely, 2^228538699 is an apocalyptic number.

228538699 is a deficient number, since it is larger than the sum of its proper divisors (528237).

228538699 is an equidigital number, since it uses as much as digits as its factorization.

228538699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528236.

The product of its digits is 1866240, while the sum is 52.

The square root of 228538699 is about 15117.4964527861. The cubic root of 228538699 is about 611.3922325463.

The spelling of 228538699 in words is "two hundred twenty-eight million, five hundred thirty-eight thousand, six hundred ninety-nine".