265242440 has 32 divisors (see below), whose sum is σ = 622745280. Its totient is φ = 101483712.

The previous prime is 265242433. The next prime is 265242491. The reversal of 265242440 is 44242562.

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, 143234 + ... + 145073.

It is an arithmetic number, because the mean of its divisors is an integer number (19460790).

Almost surely, 2^265242440 is an apocalyptic number.

265242440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

265242440 is an abundant number, since it is smaller than the sum of its proper divisors (357502840).

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

265242440 is a wasteful number, since it uses less digits than its factorization.

265242440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288341 (or 288337 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 265242440 is about 16286.2653791469. The cubic root of 265242440 is about 642.5116472021.

The spelling of 265242440 in words is "two hundred sixty-five million, two hundred forty-two thousand, four hundred forty".