228660681 has 16 divisors (see below), whose sum is σ = 318709760. Its totient is φ = 145650960.

The previous prime is 228660671. The next prime is 228660689. The reversal of 228660681 is 186066822.

It is not a de Polignac number, because 228660681 - 2¹⁵ = 228627913 is a prime.

It is a super-2 number, since 2×228660681² = 104571414070767522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228660689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8215 + ... + 22908.

It is an arithmetic number, because the mean of its divisors is an integer number (19919360).

Almost surely, 2^228660681 is an apocalyptic number.

It is an amenable number.

228660681 is a deficient number, since it is larger than the sum of its proper divisors (90049079).

228660681 is a wasteful number, since it uses less digits than its factorization.

228660681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31236.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 228660681 is about 15121.5303789001. The cubic root of 228660681 is about 611.5009895939.

The spelling of 228660681 in words is "two hundred twenty-eight million, six hundred sixty thousand, six hundred eighty-one".