265642720 has 144 divisors (see below), whose sum is σ = 754282368. Its totient is φ = 88058880.

The previous prime is 265642703. The next prime is 265642733. The reversal of 265642720 is 27246562.

265642720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242494 + ... + 243586.

It is an arithmetic number, because the mean of its divisors is an integer number (5238072).

Almost surely, 2^265642720 is an apocalyptic number.

265642720 is a gapful number since it is divisible by the number (20) 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 265642720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377141184).

265642720 is an abundant number, since it is smaller than the sum of its proper divisors (488639648).

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

265642720 is a wasteful number, since it uses less digits than its factorization.

265642720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 265642720 is about 16298.5496287246. The cubic root of 265642720 is about 642.8346916557.

The spelling of 265642720 in words is "two hundred sixty-five million, six hundred forty-two thousand, seven hundred twenty".