228121726 has 8 divisors (see below), whose sum is σ = 391065840. Its totient is φ = 97766448.

The previous prime is 228121711. The next prime is 228121727. The reversal of 228121726 is 627121822.

It is a happy number.

228121726 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228121727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8147191 + ... + 8147218.

It is an arithmetic number, because the mean of its divisors is an integer number (48883230).

Almost surely, 2^228121726 is an apocalyptic number.

228121726 is a deficient number, since it is larger than the sum of its proper divisors (162944114).

228121726 is a wasteful number, since it uses less digits than its factorization.

228121726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16294418.

The product of its digits is 5376, while the sum is 31.

The square root of 228121726 is about 15103.6990833372. The cubic root of 228121726 is about 611.0201741075.

The spelling of 228121726 in words is "two hundred twenty-eight million, one hundred twenty-one thousand, seven hundred twenty-six".