228133786 has 8 divisors (see below), whose sum is σ = 351449460. Its totient is φ = 110983968.

The previous prime is 228133771. The next prime is 228133819. The reversal of 228133786 is 687331822.

228133786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 227436561 + 697225 = 15081^2 + 835^2 .

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

It is a super-3 number, since 3×228133786³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1541371 + ... + 1541518.

Almost surely, 2^228133786 is an apocalyptic number.

228133786 is a deficient number, since it is larger than the sum of its proper divisors (123315674).

228133786 is a wasteful number, since it uses less digits than its factorization.

228133786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082928.

The product of its digits is 96768, while the sum is 40.

The square root of 228133786 is about 15104.0983180063. The cubic root of 228133786 is about 611.0309414196.

The spelling of 228133786 in words is "two hundred twenty-eight million, one hundred thirty-three thousand, seven hundred eighty-six".