265866240 has 176 divisors, whose sum is σ = 896094720. Its totient is φ = 67092480.

The previous prime is 265866193. The next prime is 265866241. The reversal of 265866240 is 42668562.

265866240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (265866241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291385 + ... + 292295.

Almost surely, 2^265866240 is an apocalyptic number.

265866240 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 265866240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448047360).

265866240 is an abundant number, since it is smaller than the sum of its proper divisors (630228480).

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

265866240 is a wasteful number, since it uses less digits than its factorization.

265866240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 265866240 is about 16305.4052387544. The cubic root of 265866240 is about 643.0149414393.

The spelling of 265866240 in words is "two hundred sixty-five million, eight hundred sixty-six thousand, two hundred forty".