265540440 has 64 divisors (see below), whose sum is σ = 869045760. Its totient is φ = 64373120.

The previous prime is 265540433. The next prime is 265540463. The reversal of 265540440 is 44045562.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 265540398 and 265540407.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 99264 + ... + 101903.

It is an arithmetic number, because the mean of its divisors is an integer number (13578840).

Almost surely, 2^265540440 is an apocalyptic number.

265540440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265540440 is an abundant number, since it is smaller than the sum of its proper divisors (603505320).

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

265540440 is a wasteful number, since it uses less digits than its factorization.

265540440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201192 (or 201188 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 265540440 is about 16295.4116241352. The cubic root of 265540440 is about 642.7521778535.

The spelling of 265540440 in words is "two hundred sixty-five million, five hundred forty thousand, four hundred forty".