265387240 has 32 divisors (see below), whose sum is σ = 597600000. Its totient is φ = 106069824.

The previous prime is 265387237. The next prime is 265387253. The reversal of 265387240 is 42783562.

It is a self number, because there is not a number n which added to its sum of digits gives 265387240.

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 7 ways as a sum of consecutive naturals, for example, 78301 + ... + 81619.

It is an arithmetic number, because the mean of its divisors is an integer number (18675000).

Almost surely, 2^265387240 is an apocalyptic number.

265387240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265387240 is an abundant number, since it is smaller than the sum of its proper divisors (332212760).

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

265387240 is a wasteful number, since it uses less digits than its factorization.

265387240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5329 (or 5325 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 265387240 is about 16290.7102362052. The cubic root of 265387240 is about 642.6285449879.

The spelling of 265387240 in words is "two hundred sixty-five million, three hundred eighty-seven thousand, two hundred forty".