265218228 has 72 divisors (see below), whose sum is σ = 741738816. Its totient is φ = 79228800.

The previous prime is 265218209. The next prime is 265218259. The reversal of 265218228 is 822812562.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 265218192 and 265218201.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 23400 + ... + 32832.

It is an arithmetic number, because the mean of its divisors is an integer number (10301928).

Almost surely, 2^265218228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265218228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370869408).

265218228 is an abundant number, since it is smaller than the sum of its proper divisors (476520588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

265218228 is a wasteful number, since it uses less digits than its factorization.

265218228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9525 (or 9520 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 265218228 is about 16285.5220364593. The cubic root of 265218228 is about 642.4920965785.

The spelling of 265218228 in words is "two hundred sixty-five million, two hundred eighteen thousand, two hundred twenty-eight".