228693818 has 16 divisors (see below), whose sum is σ = 360909864. Its totient is φ = 108541440.

The previous prime is 228693799. The next prime is 228693821. The reversal of 228693818 is 818396822.

It can be written as a sum of positive squares in 4 ways, for example, as 218241529 + 10452289 = 14773^2 + 3233^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34655 + ... + 40722.

Almost surely, 2^228693818 is an apocalyptic number.

228693818 is a deficient number, since it is larger than the sum of its proper divisors (132216046).

228693818 is a wasteful number, since it uses less digits than its factorization.

228693818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75457.

The product of its digits is 331776, while the sum is 47.

The square root of 228693818 is about 15122.6260285706. The cubic root of 228693818 is about 611.5305272906.

The spelling of 228693818 in words is "two hundred twenty-eight million, six hundred ninety-three thousand, eight hundred eighteen".