229828781 has 8 divisors (see below), whose sum is σ = 282866304. Its totient is φ = 181842480.

The previous prime is 229828771. The next prime is 229828787. The reversal of 229828781 is 187828922.

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

It is a cyclic number.

It is not a de Polignac number, because 229828781 - 2⁶ = 229828717 is a prime.

It is a super-2 number, since 2×229828781² = 105642537151891922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229828787) 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, 1262705 + ... + 1262886.

It is an arithmetic number, because the mean of its divisors is an integer number (35358288).

Almost surely, 2^229828781 is an apocalyptic number.

It is an amenable number.

229828781 is a deficient number, since it is larger than the sum of its proper divisors (53037523).

229828781 is a wasteful number, since it uses less digits than its factorization.

229828781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525611.

The product of its digits is 258048, while the sum is 47.

The square root of 229828781 is about 15160.1049138850. The cubic root of 229828781 is about 612.5404941158.

The spelling of 229828781 in words is "two hundred twenty-nine million, eight hundred twenty-eight thousand, seven hundred eighty-one".