265453440 has 128 divisors (see below), whose sum is σ = 967057920. Its totient is φ = 60672000.

The previous prime is 265453421. The next prime is 265453457. The reversal of 265453440 is 44354562.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3565 + ... + 23315.

It is an arithmetic number, because the mean of its divisors is an integer number (7555140).

Almost surely, 2^265453440 is an apocalyptic number.

265453440 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 265453440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (483528960).

265453440 is an abundant number, since it is smaller than the sum of its proper divisors (701604480).

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

265453440 is a wasteful number, since it uses less digits than its factorization.

265453440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19780 (or 19768 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

The square root of 265453440 is about 16292.7419423497. The cubic root of 265453440 is about 642.6819744254.

The spelling of 265453440 in words is "two hundred sixty-five million, four hundred fifty-three thousand, four hundred forty".