265480840 has 32 divisors (see below), whose sum is σ = 632470680. Its totient is φ = 99945472.

The previous prime is 265480837. The next prime is 265480861. The reversal of 265480840 is 48084562.

It can be written as a sum of positive squares in 4 ways, for example, as 219810276 + 45670564 = 14826^2 + 6758^2 .

It is a super-3 number, since 3×265480840³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 265480840.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194527 + ... + 195886.

Almost surely, 2^265480840 is an apocalyptic number.

265480840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265480840 is an abundant number, since it is smaller than the sum of its proper divisors (366989840).

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

265480840 is a wasteful number, since it uses less digits than its factorization.

265480840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390441 (or 390437 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 265480840 is about 16293.5827858700. The cubic root of 265480840 is about 642.7040861251.

The spelling of 265480840 in words is "two hundred sixty-five million, four hundred eighty thousand, eight hundred forty".