265153840 has 160 divisors (see below), whose sum is σ = 738238464. Its totient is φ = 86676480.

The previous prime is 265153793. The next prime is 265153841. The reversal of 265153840 is 48351562.

265153840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 265153796 and 265153805.

It is not an unprimeable number, because it can be changed into a prime (265153841) 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 31 ways as a sum of consecutive naturals, for example, 1388145 + ... + 1388335.

Almost surely, 2^265153840 is an apocalyptic number.

265153840 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 265153840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369119232).

265153840 is an abundant number, since it is smaller than the sum of its proper divisors (473084624).

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

265153840 is a wasteful number, since it uses less digits than its factorization.

265153840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 265153840 is about 16283.5450685654. The cubic root of 265153840 is about 642.4400989844.

The spelling of 265153840 in words is "two hundred sixty-five million, one hundred fifty-three thousand, eight hundred forty".