265231340 has 96 divisors (see below), whose sum is σ = 628798464. Its totient is φ = 93148160.

The previous prime is 265231327. The next prime is 265231403. The reversal of 265231340 is 43132562.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1168307 + ... + 1168533.

It is an arithmetic number, because the mean of its divisors is an integer number (6549984).

Almost surely, 2^265231340 is an apocalyptic number.

265231340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265231340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314399232).

265231340 is an abundant number, since it is smaller than the sum of its proper divisors (363567124).

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

265231340 is a wasteful number, since it uses less digits than its factorization.

265231340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 265231340 is about 16285.9245976395. The cubic root of 265231340 is about 642.5026843595.

The spelling of 265231340 in words is "two hundred sixty-five million, two hundred thirty-one thousand, three hundred forty".