228878723 has 4 divisors (see below), whose sum is σ = 234201528. Its totient is φ = 223555920.

The previous prime is 228878647. The next prime is 228878753. The reversal of 228878723 is 327878822.

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

It is a cyclic number.

It is not a de Polignac number, because 228878723 - 2¹⁴ = 228862339 is a prime.

It is a super-2 number, since 2×228878723² = 104770939684221458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228878753) 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 in 3 ways as a sum of consecutive naturals, for example, 2661338 + ... + 2661423.

It is an arithmetic number, because the mean of its divisors is an integer number (58550382).

Almost surely, 2^228878723 is an apocalyptic number.

228878723 is a deficient number, since it is larger than the sum of its proper divisors (5322805).

228878723 is an equidigital number, since it uses as much as digits as its factorization.

228878723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5322804.

The product of its digits is 602112, while the sum is 47.

The square root of 228878723 is about 15128.7383148761. The cubic root of 228878723 is about 611.6952957601.

Subtracting 228878723 from its reverse (327878822), we obtain a palindrome (99000099).

The spelling of 228878723 in words is "two hundred twenty-eight million, eight hundred seventy-eight thousand, seven hundred twenty-three".