228286981 has 8 divisors (see below), whose sum is σ = 246145760. Its totient is φ = 210470832.

The previous prime is 228286979. The next prime is 228286991. The reversal of 228286981 is 189682822.

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

It is not a de Polignac number, because 228286981 - 2¹ = 228286979 is a prime.

It is a super-2 number, since 2×228286981² = 104229891388188722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228286921) 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 7 ways as a sum of consecutive naturals, for example, 946 + ... + 21388.

It is an arithmetic number, because the mean of its divisors is an integer number (30768220).

Almost surely, 2^228286981 is an apocalyptic number.

It is an amenable number.

228286981 is a deficient number, since it is larger than the sum of its proper divisors (17858779).

228286981 is a wasteful number, since it uses less digits than its factorization.

228286981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21315.

The product of its digits is 221184, while the sum is 46.

The square root of 228286981 is about 15109.1687726360. The cubic root of 228286981 is about 611.1676827323.

The spelling of 228286981 in words is "two hundred twenty-eight million, two hundred eighty-six thousand, nine hundred eighty-one".