228528877 has 4 divisors (see below), whose sum is σ = 229038300. Its totient is φ = 228019456.

The previous prime is 228528857. The next prime is 228528887. The reversal of 228528877 is 778825822.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59814756 + 168714121 = 7734^2 + 12989^2 .

It is a cyclic number.

It is not a de Polignac number, because 228528877 - 2²⁷ = 94311149 is a prime.

It is a super-2 number, since 2×228528877² = 104450895245762258, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228528877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228528857) 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, 254038 + ... + 254935.

It is an arithmetic number, because the mean of its divisors is an integer number (57259575).

Almost surely, 2^228528877 is an apocalyptic number.

It is an amenable number.

228528877 is a deficient number, since it is larger than the sum of its proper divisors (509423).

228528877 is an equidigital number, since it uses as much as digits as its factorization.

228528877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509422.

The product of its digits is 1003520, while the sum is 49.

The square root of 228528877 is about 15117.1715939193. The cubic root of 228528877 is about 611.3834737372.

The spelling of 228528877 in words is "two hundred twenty-eight million, five hundred twenty-eight thousand, eight hundred seventy-seven".