228621005 has 8 divisors (see below), whose sum is σ = 275544600. Its totient is φ = 182097216.

The previous prime is 228620999. The next prime is 228621013. The reversal of 228621005 is 500126822.

It can be written as a sum of positive squares in 4 ways, for example, as 86081284 + 142539721 = 9278^2 + 11939^2 .

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 228621005 - 2¹⁰ = 228619981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98690 + ... + 100979.

It is an arithmetic number, because the mean of its divisors is an integer number (34443075).

Almost surely, 2^228621005 is an apocalyptic number.

It is an amenable number.

228621005 is a deficient number, since it is larger than the sum of its proper divisors (46923595).

228621005 is a wasteful number, since it uses less digits than its factorization.

228621005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199903.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 228621005 is about 15120.2184177346. The cubic root of 228621005 is about 611.4656194017.

Adding to 228621005 its reverse (500126822), we get a palindrome (728747827).

The spelling of 228621005 in words is "two hundred twenty-eight million, six hundred twenty-one thousand, five".