228535828 has 24 divisors (see below), whose sum is σ = 434913192. Its totient is φ = 104638464.

The previous prime is 228535823. The next prime is 228535837. The reversal of 228535828 is 828535822.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 129095044 + 99440784 = 11362^2 + 9972^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228535823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42901 + ... + 47932.

It is an arithmetic number, because the mean of its divisors is an integer number (18121383).

Almost surely, 2^228535828 is an apocalyptic number.

It is an amenable number.

228535828 is a deficient number, since it is larger than the sum of its proper divisors (206377364).

228535828 is a wasteful number, since it uses less digits than its factorization.

228535828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90891 (or 90889 counting only the distinct ones).

The product of its digits is 307200, while the sum is 43.

The square root of 228535828 is about 15117.4014962890. The cubic root of 228535828 is about 611.3896723461.

The spelling of 228535828 in words is "two hundred twenty-eight million, five hundred thirty-five thousand, eight hundred twenty-eight".