265863140 has 12 divisors (see below), whose sum is σ = 558312636. Its totient is φ = 106345248.

The previous prime is 265863137. The next prime is 265863149. The reversal of 265863140 is 41368562.

It can be written as a sum of positive squares in 2 ways, for example, as 42719296 + 223143844 = 6536^2 + 14938^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 265863140.

It is not an unprimeable number, because it can be changed into a prime (265863149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6646559 + ... + 6646598.

It is an arithmetic number, because the mean of its divisors is an integer number (46526053).

Almost surely, 2^265863140 is an apocalyptic number.

265863140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265863140 is an abundant number, since it is smaller than the sum of its proper divisors (292449496).

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

265863140 is a wasteful number, since it uses less digits than its factorization.

265863140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13293166 (or 13293164 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 265863140 is about 16305.3101779758. The cubic root of 265863140 is about 643.0124422451.

The spelling of 265863140 in words is "two hundred sixty-five million, eight hundred sixty-three thousand, one hundred forty".