265306540 has 24 divisors (see below), whose sum is σ = 568999872. Its totient is φ = 103864320.

The previous prime is 265306501. The next prime is 265306549. The reversal of 265306540 is 45603562.

It is not an unprimeable number, because it can be changed into a prime (265306549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140181 + ... + 142060.

It is an arithmetic number, because the mean of its divisors is an integer number (23708328).

Almost surely, 2^265306540 is an apocalyptic number.

265306540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265306540 is an abundant number, since it is smaller than the sum of its proper divisors (303693332).

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

265306540 is a wasteful number, since it uses less digits than its factorization.

265306540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282297 (or 282295 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 265306540 is about 16288.2331761306. The cubic root of 265306540 is about 642.5634007091.

The spelling of 265306540 in words is "two hundred sixty-five million, three hundred six thousand, five hundred forty".