228723986 has 8 divisors (see below), whose sum is σ = 354916620. Its totient is φ = 110418448.

The previous prime is 228723977. The next prime is 228724049. The reversal of 228723986 is 689327822.

It can be written as a sum of positive squares in 2 ways, for example, as 221265625 + 7458361 = 14875^2 + 2731^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 228723986.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1971701 + ... + 1971816.

Almost surely, 2^228723986 is an apocalyptic number.

228723986 is a deficient number, since it is larger than the sum of its proper divisors (126192634).

228723986 is a wasteful number, since it uses less digits than its factorization.

228723986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3943548.

The product of its digits is 580608, while the sum is 47.

The square root of 228723986 is about 15123.6234414905. The cubic root of 228723986 is about 611.5574159955.

The spelling of 228723986 in words is "two hundred twenty-eight million, seven hundred twenty-three thousand, nine hundred eighty-six".