228987775 has 6 divisors (see below), whose sum is σ = 283944872. Its totient is φ = 183190200.

The previous prime is 228987761. The next prime is 228987823. The reversal of 228987775 is 577789822.

It is not a de Polignac number, because 228987775 - 2¹¹ = 228985727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 4579731 + ... + 4579780.

Almost surely, 2^228987775 is an apocalyptic number.

228987775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

228987775 is a deficient number, since it is larger than the sum of its proper divisors (54957097).

228987775 is an equidigital number, since it uses as much as digits as its factorization.

228987775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9159521 (or 9159516 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 55.

The square root of 228987775 is about 15132.3420196611. The cubic root of 228987775 is about 611.7924301768.

The spelling of 228987775 in words is "two hundred twenty-eight million, nine hundred eighty-seven thousand, seven hundred seventy-five".