265638228 has 24 divisors (see below), whose sum is σ = 621671232. Its totient is φ = 88281984.

The previous prime is 265638199. The next prime is 265638257. The reversal of 265638228 is 822836562.

It is an interprime number because it is at equal distance from previous prime (265638199) and next prime (265638257).

It is a self number, because there is not a number n which added to its sum of digits gives 265638228.

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, 28800 + ... + 36887.

It is an arithmetic number, because the mean of its divisors is an integer number (25902968).

Almost surely, 2^265638228 is an apocalyptic number.

It is an amenable number.

265638228 is an abundant number, since it is smaller than the sum of its proper divisors (356033004).

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

265638228 is a wasteful number, since it uses less digits than its factorization.

265638228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66031 (or 66029 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 265638228 is about 16298.4118244693. The cubic root of 265638228 is about 642.8310682052.

The spelling of 265638228 in words is "two hundred sixty-five million, six hundred thirty-eight thousand, two hundred twenty-eight".