265354640 has 40 divisors (see below), whose sum is σ = 638229240. Its totient is φ = 102480896.

The previous prime is 265354631. The next prime is 265354651. The reversal of 265354640 is 46453562.

It is a happy number.

265354640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 55696 + 265298944 = 236^2 + 16288^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 265354640.

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, 54869 + ... + 59508.

It is an arithmetic number, because the mean of its divisors is an integer number (15955731).

Almost surely, 2^265354640 is an apocalyptic number.

265354640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265354640 is an abundant number, since it is smaller than the sum of its proper divisors (372874600).

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

265354640 is a wasteful number, since it uses less digits than its factorization.

265354640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114419 (or 114413 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

The square root of 265354640 is about 16289.7096352268. The cubic root of 265354640 is about 642.6022305496.

The spelling of 265354640 in words is "two hundred sixty-five million, three hundred fifty-four thousand, six hundred forty".