228840681 has 8 divisors (see below), whose sum is σ = 305500384. Its totient is φ = 152370720.

The previous prime is 228840673. The next prime is 228840701. The reversal of 228840681 is 186048822.

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

It is not a de Polignac number, because 228840681 - 2³ = 228840673 is a prime.

It is a super-2 number, since 2×228840681² = 104736114561087522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228840611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44596 + ... + 49461.

It is an arithmetic number, because the mean of its divisors is an integer number (38187548).

Almost surely, 2^228840681 is an apocalyptic number.

It is an amenable number.

228840681 is a deficient number, since it is larger than the sum of its proper divisors (76659703).

228840681 is an equidigital number, since it uses as much as digits as its factorization.

228840681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94871.

The product of its (nonzero) digits is 49152, while the sum is 39.

The square root of 228840681 is about 15127.4809866018. The cubic root of 228840681 is about 611.6614038638.

The spelling of 228840681 in words is "two hundred twenty-eight million, eight hundred forty thousand, six hundred eighty-one".