228439561 has 8 divisors (see below), whose sum is σ = 261337664. Its totient is φ = 195607440.

The previous prime is 228439531. The next prime is 228439567. The reversal of 228439561 is 165934822.

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

It is not a de Polignac number, because 228439561 - 2¹³ = 228431369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228439567) 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, 8835 + ... + 23128.

It is an arithmetic number, because the mean of its divisors is an integer number (32667208).

Almost surely, 2^228439561 is an apocalyptic number.

It is an amenable number.

228439561 is a deficient number, since it is larger than the sum of its proper divisors (32898103).

228439561 is a wasteful number, since it uses less digits than its factorization.

228439561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32991.

The product of its digits is 103680, while the sum is 40.

The square root of 228439561 is about 15114.2171811841. The cubic root of 228439561 is about 611.3038143049.

The spelling of 228439561 in words is "two hundred twenty-eight million, four hundred thirty-nine thousand, five hundred sixty-one".