265144880 has 360 divisors, whose sum is σ = 868600656. Its totient is φ = 74511360.

The previous prime is 265144877. The next prime is 265144889. The reversal of 265144880 is 88441562.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (265144889) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6166139 + ... + 6166181.

Almost surely, 2^265144880 is an apocalyptic number.

265144880 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 265144880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434300328).

265144880 is an abundant number, since it is smaller than the sum of its proper divisors (603455776).

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

265144880 is a wasteful number, since it uses less digits than its factorization.

265144880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 265144880 is about 16283.2699418759. The cubic root of 265144880 is about 642.4328625210.

The spelling of 265144880 in words is "two hundred sixty-five million, one hundred forty-four thousand, eight hundred eighty".