265939872 has 96 divisors (see below), whose sum is σ = 772498944. Its totient is φ = 79430400.

The previous prime is 265939853. The next prime is 265939873. The reversal of 265939872 is 278939562.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (265939873) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 73203 + ... + 76749.

It is an arithmetic number, because the mean of its divisors is an integer number (8046864).

Almost surely, 2^265939872 is an apocalyptic number.

265939872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265939872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386249472).

265939872 is an abundant number, since it is smaller than the sum of its proper divisors (506559072).

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

265939872 is a wasteful number, since it uses less digits than its factorization.

265939872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642 (or 3634 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The square root of 265939872 is about 16307.6629840085. The cubic root of 265939872 is about 643.0742972340.

The spelling of 265939872 in words is "two hundred sixty-five million, nine hundred thirty-nine thousand, eight hundred seventy-two".