228835687 has 6 divisors (see below), whose sum is σ = 230088992. Its totient is φ = 227584632.

The previous prime is 228835681. The next prime is 228835699. The reversal of 228835687 is 786538822.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-228835687 is a prime.

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 228835687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228835681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 225393 + ... + 226405.

Almost surely, 2^228835687 is an apocalyptic number.

228835687 is a deficient number, since it is larger than the sum of its proper divisors (1253305).

228835687 is an frugal number, since it uses more digits than its factorization.

228835687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2249 (or 1236 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 49.

The square root of 228835687 is about 15127.3159218680. The cubic root of 228835687 is about 611.6569543938.

The spelling of 228835687 in words is "two hundred twenty-eight million, eight hundred thirty-five thousand, six hundred eighty-seven".