228681766 has 8 divisors (see below), whose sum is σ = 347155704. Its totient is φ = 112963200.

The previous prime is 228681757. The next prime is 228681769. The reversal of 228681766 is 667186822.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228681769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688635 + ... + 688966.

It is an arithmetic number, because the mean of its divisors is an integer number (43394463).

Almost surely, 2^228681766 is an apocalyptic number.

228681766 is a deficient number, since it is larger than the sum of its proper divisors (118473938).

228681766 is a wasteful number, since it uses less digits than its factorization.

228681766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377686.

The product of its digits is 387072, while the sum is 46.

The square root of 228681766 is about 15122.2275475540. The cubic root of 228681766 is about 611.5197846953.

The spelling of 228681766 in words is "two hundred twenty-eight million, six hundred eighty-one thousand, seven hundred sixty-six".